Leetcode简单题

今天药忘吃喽~ 2023-06-04 02:45 13阅读 0赞

<table> 
 <thead> 
  <tr> 
   <th>#</th> 
   <th>Title</th> 
   <th>Solution</th> 
   <th>Acceptance</th> 
   <th>Difficulty</th> 
   <th>Frequency&nbsp;&nbsp;<span title=""></span></th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>&nbsp;</td> 
   <td>1</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/two-sum" rel="nofollow">Two Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>44.5%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>2</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/add-two-numbers" rel="nofollow">Add Two Numbers</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>31.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>3</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/longest-substring-without-repeating-characters" rel="nofollow">Longest Substring Without Repeating Characters</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>28.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>4</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/median-of-two-sorted-arrays" rel="nofollow">Median of Two Sorted Arrays</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>27.2%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>5</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/longest-palindromic-substring" rel="nofollow">Longest Palindromic Substring</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>27.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>10</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/regular-expression-matching" rel="nofollow">Regular Expression Matching</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>25.6%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>11</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/container-with-most-water" rel="nofollow">Container With Most Water</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>46.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>15</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/3sum" rel="nofollow">3Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>24.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>17</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/letter-combinations-of-a-phone-number" rel="nofollow">Letter Combinations of a Phone Number</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>19</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/remove-nth-node-from-end-of-list" rel="nofollow">Remove Nth Node From End of List</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>34.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>20</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/valid-parentheses" rel="nofollow">Valid Parentheses</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>37.1%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>21</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/merge-two-sorted-lists" rel="nofollow">Merge Two Sorted Lists</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.6%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>22</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/generate-parentheses" rel="nofollow">Generate Parentheses</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>56.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>23</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/merge-k-sorted-lists" rel="nofollow">Merge k Sorted Lists</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>35.8%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>31</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/next-permutation" rel="nofollow">Next Permutation</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>31.0%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>32</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/longest-valid-parentheses" rel="nofollow">Longest Valid Parentheses</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>26.2%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>33</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/search-in-rotated-sorted-array" rel="nofollow">Search in Rotated Sorted Array</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>33.1%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>34</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array" rel="nofollow">Find First and Last Position of Element in Sorted Array</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>34.1%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>39</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/combination-sum" rel="nofollow">Combination Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>50.4%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>42</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/trapping-rain-water" rel="nofollow">Trapping Rain Water</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>44.4%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>46</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/permutations" rel="nofollow">Permutations</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>57.1%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>48</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/rotate-image" rel="nofollow">Rotate Image</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>50.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>49</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/group-anagrams" rel="nofollow">Group Anagrams</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>53</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/maximum-subarray" rel="nofollow">Maximum Subarray</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>44.4%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>55</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/jump-game" rel="nofollow">Jump Game</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>32.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>56</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/merge-intervals" rel="nofollow">Merge Intervals</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>36.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>62</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/unique-paths" rel="nofollow">Unique Paths</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>64</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/minimum-path-sum" rel="nofollow">Minimum Path Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>70</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/climbing-stairs" rel="nofollow">Climbing Stairs</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>44.9%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>72</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/edit-distance" rel="nofollow">Edit Distance</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>39.1%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>75</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/sort-colors" rel="nofollow">Sort Colors</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>43.1%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>76</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/minimum-window-substring" rel="nofollow">Minimum Window Substring</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>31.7%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>78</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/subsets" rel="nofollow">Subsets</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>54.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>79</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/word-search" rel="nofollow">Word Search</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>32.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>84</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/largest-rectangle-in-histogram" rel="nofollow">Largest Rectangle in Histogram</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>32.1%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>85</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/maximal-rectangle" rel="nofollow">Maximal Rectangle</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>34.4%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>94</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/binary-tree-inorder-traversal" rel="nofollow">Binary Tree Inorder Traversal</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>58.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>96</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/unique-binary-search-trees" rel="nofollow">Unique Binary Search Trees</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>47.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>98</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/validate-binary-search-tree" rel="nofollow">Validate Binary Search Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>26.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>101</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/symmetric-tree" rel="nofollow">Symmetric Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>44.2%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>102</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/binary-tree-level-order-traversal" rel="nofollow">Binary Tree Level Order Traversal</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>49.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>104</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/maximum-depth-of-binary-tree" rel="nofollow">Maximum Depth of Binary Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>61.8%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>105</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal" rel="nofollow">Construct Binary Tree from Preorder and Inorder Traversal</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>114</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/flatten-binary-tree-to-linked-list" rel="nofollow">Flatten Binary Tree to Linked List</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>43.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>121</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/best-time-to-buy-and-sell-stock" rel="nofollow">Best Time to Buy and Sell Stock</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.1%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>124</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/binary-tree-maximum-path-sum" rel="nofollow">Binary Tree Maximum Path Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>30.8%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>128</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/longest-consecutive-sequence" rel="nofollow">Longest Consecutive Sequence</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.5%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>136</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/single-number" rel="nofollow">Single Number</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>61.3%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>139</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/word-break" rel="nofollow">Word Break</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>36.4%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>141</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/linked-list-cycle" rel="nofollow">Linked List Cycle</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>37.9%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>142</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/linked-list-cycle-ii" rel="nofollow">Linked List Cycle II</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>33.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>146</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/lru-cache" rel="nofollow">LRU Cache</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>27.0%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>148</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/sort-list" rel="nofollow">Sort List</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>36.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>152</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/maximum-product-subarray" rel="nofollow">Maximum Product Subarray</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>29.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>155</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/min-stack" rel="nofollow">Min Stack</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>38.5%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>160</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/intersection-of-two-linked-lists" rel="nofollow">Intersection of Two Linked Lists</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>35.3%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>169</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/majority-element" rel="nofollow">Majority Element</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>53.9%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>198</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/house-robber" rel="nofollow">House Robber</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>41.3%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>200</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/number-of-islands" rel="nofollow">Number of Islands</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.6%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>206</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/reverse-linked-list" rel="nofollow">Reverse Linked List</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>56.5%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>207</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/course-schedule" rel="nofollow">Course Schedule</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>39.0%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>208</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/implement-trie-prefix-tree" rel="nofollow">Implement Trie (Prefix Tree)</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>40.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>215</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/kth-largest-element-in-an-array" rel="nofollow">Kth Largest Element in an Array</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>49.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>221</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/maximal-square" rel="nofollow">Maximal Square</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>33.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>226</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/invert-binary-tree" rel="nofollow">Invert Binary Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>59.4%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>234</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/palindrome-linked-list" rel="nofollow">Palindrome Linked List</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>36.9%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>236</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree" rel="nofollow">Lowest Common Ancestor of a Binary Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>39.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>238</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/product-of-array-except-self" rel="nofollow">Product of Array Except Self</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>56.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>239</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/sliding-window-maximum" rel="nofollow">Sliding Window Maximum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>39.1%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>240</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/search-a-2d-matrix-ii" rel="nofollow">Search a 2D Matrix II</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>41.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>253</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/meeting-rooms-ii" rel="nofollow">Meeting Rooms II</a>&nbsp;&nbsp; 
     <span>&nbsp;&nbsp;</span> 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>43.4%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>279</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/perfect-squares" rel="nofollow">Perfect Squares</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.9%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>283</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/move-zeroes" rel="nofollow">Move Zeroes</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>55.0%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>287</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/find-the-duplicate-number" rel="nofollow">Find the Duplicate Number</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>50.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>295</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/find-median-from-data-stream" rel="nofollow">Find Median from Data Stream</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>38.2%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>297</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/serialize-and-deserialize-binary-tree" rel="nofollow">Serialize and Deserialize Binary Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.3%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>300</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/longest-increasing-subsequence" rel="nofollow">Longest Increasing Subsequence</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>41.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>301</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/remove-invalid-parentheses" rel="nofollow">Remove Invalid Parentheses</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>40.1%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>309</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown" rel="nofollow">Best Time to Buy and Sell Stock with Cooldown</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>44.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>312</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/burst-balloons" rel="nofollow">Burst Balloons</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.3%</td> 
   <td><span>Hard</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>322</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/coin-change" rel="nofollow">Coin Change</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>31.6%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>337</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/house-robber-iii" rel="nofollow">House Robber III</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>338</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/counting-bits" rel="nofollow">Counting Bits</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>65.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>347</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/top-k-frequent-elements" rel="nofollow">Top K Frequent Elements</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>56.3%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>394</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/decode-string" rel="nofollow">Decode String</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>46.1%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>399</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/evaluate-division" rel="nofollow">Evaluate Division</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>48.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>406</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/queue-reconstruction-by-height" rel="nofollow">Queue Reconstruction by Height</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>60.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>416</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/partition-equal-subset-sum" rel="nofollow">Partition Equal Subset Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>41.5%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>437</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/path-sum-iii" rel="nofollow">Path Sum III</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>43.5%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>438</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/find-all-anagrams-in-a-string" rel="nofollow">Find All Anagrams in a String</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>38.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>448</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array" rel="nofollow">Find All Numbers Disappeared in an Array</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>54.1%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>494</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/target-sum" rel="nofollow">Target Sum</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>45.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>538</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/convert-bst-to-greater-tree" rel="nofollow">Convert BST to Greater Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>52.1%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>543</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/diameter-of-binary-tree" rel="nofollow">Diameter of Binary Tree</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>47.3%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>560</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/subarray-sum-equals-k" rel="nofollow">Subarray Sum Equals K</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>42.8%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>581</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/shortest-unsorted-continuous-subarray" rel="nofollow">Shortest Unsorted Continuous Subarray</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>30.4%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>617</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/merge-two-binary-trees" rel="nofollow">Merge Two Binary Trees</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>71.0%</td> 
   <td><span>Easy</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>621</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/task-scheduler" rel="nofollow">Task Scheduler</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>46.2%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>647</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/palindromic-substrings" rel="nofollow">Palindromic Substrings</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>57.7%</td> 
   <td><span>Medium</span></td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>&nbsp;</td> 
   <td>739</td> 
   <td> 
    <div> 
     <a href="https://leetcode.com/problems/daily-temperatures" rel="nofollow">Daily Temperatures</a>&nbsp;&nbsp;&nbsp;&nbsp; 
    </div> </td> 
   <td>&nbsp;</td> 
   <td>60.5%</td> 
   <td><span>Medium<br><br></span></td> 
  </tr> 
 </tbody> 
</table>

转载于:https://www.cnblogs.com/think90/p/11443088.html