【笔试】敏感词替换-携程旅游2020秋招笔试第一场

Bertha 。 2022-12-05 02:29 167阅读 0赞

## 描述 ##

（匹配条件全排列）  
输入三行  
替换字符串  
被替换部分，根据全排列进行匹配

## 解题思路 ##

import java.util.*;
    
    /** * @Author bennyrhys * @Date 2020-09-08 19:44 * jack * i love jack,jack love me * you * i love you,you love me */
    public class T42 { 
        private static StringBuilder sb =  new StringBuilder();
        private static HashSet<String> hashSet = new HashSet<>();
    
        public static void main(String[] args) { 
            Scanner sc = new Scanner(System.in);
            char[] carr1 = sc.nextLine().toCharArray();
            char[] carr2 = sc.nextLine().toCharArray();
            char[] carr3 = sc.nextLine().toCharArray();
    
            /*for (char c : carr1) { System.out.print(c); } System.out.println(); for (char c : carr2) { System.out.print(c); } System.out.println(); for (char c : carr3) { System.out.print(c); }*/
    
            fullSort(carr1, 0, carr1.length-1);
    
    // System.out.println(sb.toString());
    
    // String[] qarr = sb.toString().split("*");
    // for (String s : qarr) { 
    // System.out.println(s);
    // hashSet.add(s);
    // }
    //
    // for (String s : hashSet) { 
    // System.out.println(s);
    // }
    
    
            String res = "";
    
            String s = "";
            int len1 = carr1.length;
            int index = 0;
            for (int i = 0; i < carr2.length - len1 + 1; i++) { 
    
                 s = String.valueOf(carr2).substring(i, i+len1);
                //System.out.println(s);
                if (hashSet.contains(s)) { 
    // System.out.println(s+"===");
                    /*int flag = 0; while (flag < carr3.length) { System.out.println(carr3[flag]); carr2[i] = carr3[flag++]; }*/
                    res += String.valueOf(carr3);
                    i = i + len1-1;
                }else { 
    // res += String.valueOf(carr2[i]);
                    res += carr2[i];
                    index = i;
                    // System.out.println(carr2[i]);
                }
    
            }
            if (index < carr2.length) { 
                res += String.valueOf(carr2).substring(index+1, carr2.length);
            }
    
    
    
                System.out.print(res);
                //jack
                //i love jack,jack love me
                //you
    
    
        }
        // 全排列
        private static void fullSort(char[] carr , int l, int r) { 
            if (l == r) { 
               /* for (char c : carr) { sb.append(c); //System.out.println(c); } sb.append('*');*/
                //System.out.println();
    // System.out.println(String.valueOf(carr));
                hashSet.add(String.valueOf(carr));
            }
            for (int i = l; i <= r; i++) { 
                swap(carr, i, l);
                fullSort(carr, l+1, r);
                swap(carr, l, i);
            }
        }
    
        // 交换
        private static void swap(char[] carr, int i, int l) { 
            char temp = carr[i];
            carr[i] = carr[l];
            carr[l] = temp;
        }
    }