Java刷题--蓝桥杯第八届JavaC组1---3

客官°小女子只卖身不卖艺 2024-03-26 15:21 82阅读 0赞

1.  ## 外星日历 ##

### 题目 ###

某星系深处发现了文明遗迹。

他们的计数也是用十进制。

他们的文明也有日历。日历只有天数，没有年、月的概念。

有趣的是，他们也使用了类似“星期”的概念，

只不过他们的一个星期包含了9天，

为了方便，这里分别记为: A,B,C....H,I

从一些资料上看到，

他们的23日是星期E

他们的190日是星期A

他们的343251日是星期I

令人兴奋的是，他们居然也预见了“世界末日”的那天，

当然是一个很大很大的数字

651764141421415346185

请你计算一下，这遥远的一天是该文明的星期几？

你需要提交的是一个大写字母，表示该文明的星期几，

不要填写任何多余的内容。

### 解题思路 ###

就是对BigInteger的应用

BigInteger的更多用法可以参考

[(11条消息) BigInteger方法与诸函数\_CLODVEP的博客-CSDN博客][11_ BigInteger_CLODVEP_-CSDN]

### 代码实现 ###

package 省赛一轮;
    
    import java.math.BigInteger;
    
    public class 第8届题目1 {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            BigInteger x = new BigInteger("651764141421415346185");
            BigInteger y = x.mod(new BigInteger("9"));
            int z = y.intValue();
            System.out.println((char)('A'+z-1));
        }
    
    }

输出结果 G

## 2、兴趣小组 ##

### 题目 ###

为丰富同学们的业余文化生活，某高校学生会创办了3个兴趣小组

（以下称A组，B组，C组）。

每个小组的学生名单分别在【A.txt】,【B.txt】和【C.txt】中。

每个文件中存储的是学生的学号。

由于工作需要，我们现在想知道：

既参加了A组，又参加了B组，但是没有参加C组的同学一共有多少人？

请你统计该数字并通过浏览器提交答案。

### 解题思路 ###

通过双for循环，实现全比对，比对成功计数+1

创建新集合，存储参加A、B的，

双for比对c，比对成功计数-1

### 代码实现 ###

package 省赛一轮;
    
    public class 第8届题目3 {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
    
            int[] a = { 12894792, 92774113, 59529208, 22962224, 2991600, 83340521, 87365045, 40818286, 16400628, 39475245,
                    55933381, 76940287, 61366748, 95631228, 17102313, 50682833, 61562613, 87002524, 83062019, 51743442,
                    61977890, 32010762, 69680621, 87179571, 81761697, 32364296, 7833271, 36198035, 26588918, 84046668,
                    43059468, 73191775, 56794101, 454780, 11141030, 10008994, 35072237, 44945158, 53959980, 75758119,
                    18560273, 35801494, 42102550, 22496415, 3981786, 34593672, 13074905, 07733442, 42374678, 23452507,
                    98586743, 30771281, 17703080, 52123562, 5898131, 56698981, 90758589, 18238802, 18217979, 4511837,
                    75682969, 31135682, 55379006, 42224598, 98263070, 40228312, 28924663, 11580163, 25686441, 45944028,
                    96731602, 53675990, 3854194, 14858183, 16866794, 40677007, 73141512, 32317341, 56641725, 43123040,
                    15201174, 62389950, 72887083, 76860787, 61046319, 6923746, 17874548, 46028629, 10577743, 48747364,
                    5328780, 59855415, 60965266, 20592606, 14471207, 70896866, 46938647, 33575820, 53426294, 56093931,
                    51326542, 94050481, 80114017, 33010503, 72971538, 22407422, 17305672, 78974338, 93209260, 83461794,
                    41247821, 26118061, 10657376, 42198057, 15338224, 50284714, 32232841, 26716521, 76048344, 23676625,
                    62897700, 69296551, 59653393, 38704390, 48481614, 69782897, 26850668, 37471053, 88720989, 51010849,
                    94951571, 60024611, 29808329, 70377786, 13899299, 9683688, 58218284, 46792829, 97221709, 45286643,
                    48158629, 57367208, 26903401, 76900414, 87927040, 9926730, 1508757, 15101101, 62491840, 43802529 };
            int[] b = { 44894050, 34662733, 44141729, 92774113, 99208727, 91919833, 23727681, 10003409, 55933381, 54443275,
                    13584702, 96523685, 50682833, 61562613, 62380975, 20311684, 93200452, 23101945, 42192880, 28992561,
                    18460278, 19186537, 58465301, 01111066, 62680429, 23721241, 20277631, 91708977, 57514737, 3981786,
                    81541612, 07346443, 93154608, 19709455, 37446968, 17703080, 72378958, 66200696, 30610382, 89586343,
                    33152171, 67040930, 35696683, 63242065, 99948221, 96233367, 52593493, 98263070, 1418023, 74816705,
                    89375940, 58405334, 96731602, 84089545, 16866794, 94737626, 01673442, 70548494, 13638168, 8163691,
                    11106566, 64375392, 40267902, 897705, 56447313, 54532235, 94738425, 66642634, 83219544, 40546096,
                    66924991, 20592606, 96037590, 73434467, 70896866, 91025618, 57892091, 8487641, 32500082, 84412833,
                    23311447, 38380409, 79957822, 72971538, 69645784, 91863314, 73099909, 93209260, 83461794, 81378487,
                    30423273, 22233715, 32232841, 26716521, 03511221, 29196547, 58263562, 56233305, 52547525, 55812835,
                    87253244, 52484232, 80837360, 94098464, 52028151, 53267501, 66381929, 84381316, 59788467, 9683688,
                    67082008, 71605255, 80654064, 21434307, 45286643, 76556656, 82465821, 57367208, 79218980, 48460468,
                    59170479, 46046391, 43043164, 96544490, 83340521, 70837892, 18926791, 40818286, 28936302, 11489524,
                    51031183, 73860337, 13241219, 9025448, 10718828, 76360986, 26031606, 76558053, 97726139, 46473415,
                    48406387, 23625539, 86756012, 35164187, 49161302, 78082834, 35072237, 8602486, 29815841, 56562216,
                    77684187, 81751704, 20160464, 50407962, 27786415, 19893526, 934129, 37759498, 52636463, 25666982,
                    43262852, 38393436, 2581136, 29323250, 56950657, 5898131, 95286262, 75574581, 54057961, 6703896,
                    90758589, 57782642, 34492535, 41919697, 6395464, 10993500, 81212949, 34017532, 69569396, 99009936,
                    57129610, 67401593, 71044018, 62076698, 29533873, 71936325, 86874388, 26545032, 35695544, 30433724,
                    53127345, 72887083, 25390873, 63711546, 6923746, 27783723, 33199575, 35929698, 16491251, 18276792,
                    62744775, 92096155, 06336570, 56141974, 73007273, 31416832, 00171057, 64176982, 46938647, 58460388,
                    69972026, 73724304, 27435484, 51568616, 15531822, 47788699, 11818851, 41594694, 83561325, 43107163,
                    56965375, 10557343, 26118061, 74650126, 90076467, 10657376, 49901436, 03425162, 61164599, 15797769,
                    5427896, 14444084, 36795868, 18079449, 59653393, 72942548, 06763077, 33895610, 94892653, 12085268,
                    65174140, 79567366, 23020126, 74290047, 13498869, 21696323, 27724594, 54941003, 38229841, 7050068 };
            int[] c = { 13404901, 39952424, 47847739, 94939581, 13809950, 70966043, 11161555, 17102313, 47079425, 50682833,
                    74154313, 61562613, 93200452, 37103342, 18479435, 32502597, 36198035, 54210010, 73191775, 48358178,
                    85544503, 5996766, 54651623, 52113220, 27465181, 23871783, 22496415, 54107041, 65899605, 56528700,
                    82671109, 61176034, 42374678, 51612628, 63329997, 56591652, 04552733, 12789324, 89586343, 51935014,
                    38611966, 43916409, 70996050, 98263070, 1418023, 65345049, 21734275, 76846198, 71506230, 833171,
                    67128139, 41367555, 64769510, 44010700, 16475199, 93164325, 9386162, 95324041, 80688223, 67629139,
                    79552617, 76219736, 50368644, 45096021, 54972488, 63779011, 28862942, 73145521, 74078605, 66924991,
                    12806850, 02171001, 70896866, 73434467, 8487641, 44415025, 32500082, 84412833, 83896188, 52243759,
                    49191410, 38744339, 48079796, 44937032, 06267501, 81866886, 38575984, 25978688, 78974338, 41247821,
                    12356966, 64842303, 79127158, 2366944, 68000570, 12426275, 96409230, 705972, 8266503, 83820884, 8831807,
                    43273308, 23216105, 29196547, 95160161, 05553537, 52182214, 32641346, 91553427, 24436506, 77433749,
                    1979664, 52028151, 88985343, 1761499, 76203088, 63237368, 23405334, 59788467, 9683688, 67755443,
                    29946533, 12053603, 437479, 15200030, 45286643, 93537527, 82465821, 57367208, 53899751, 15354933,
                    97760830, 68933762, 80220545, 1892750, 39868288, 21524323, 69716610, 65083815, 78048499, 3227391,
                    83340521, 87365045, 71720254, 51031183, 89168555, 8503028, 37086236, 25103057, 87002524, 22808816,
                    80928090, 90741678, 15993372, 99117082, 49938176, 21755083, 86903426, 87830263, 53959980, 75758119,
                    59781354, 58679691, 25666982, 56307643, 47180521, 62776522, 78136608, 44882734, 90758589, 8075999,
                    66303819, 23480347, 11580163, 87080118, 18329165, 92514163, 89404632, 92377859, 3912329, 17499963,
                    59699979, 79876366, 63894807, 37857001, 86003935, 90087123, 29433345, 80298948, 61531153, 61046319,
                    37839841, 19421134, 48747364, 35196916, 62484573, 59907079, 36845702, 21631642, 72739317, 26283700,
                    80114017, 76639390, 29154110, 35159758, 47788699, 11818851, 56520669, 36396767, 36031167, 83817428,
                    10657376, 90076467, 14676452, 11024560, 16327605, 76048344, 14444084, 95452011, 99612346, 65172562,
                    84813675, 88618282, 38704390, 27998014, 63859011, 33787505, 60024611, 16229880, 13899299, 35240335,
                    29173227, 45036451, 66177893, 82658333, 43100730, 44520187, 74290047, 85013538, 9926730, 27724594,
                    95148523, 20503000, 64390907, 26006953, 98116293, 97457666, 29017396, 04634371, 70791589 };
    
            int [] temp = new int [a.length];
            int num = 0;
            for (int i = 0; i < a.length; i++) {
                for (int j = 0; j < b.length; j++) {
                    if (a[i] == b[j]) {
                        temp[num] = a[i];
                        num++;
                    }
                }
            }
            for (int i = 0; i < temp.length; i++) {
                for (int j = 0; j < c.length; j++) {
                    if (temp[i] == c[j]) {
                        num--;
                    }
                }
            }
            System.out.println(num);
        }
    
    }

结果输出 20

## 3、纸牌三角形 ##

### 题目 ###

A,2,3,4,5,6,7,8,9 共9张纸牌排成一个正三角形（A按1计算）。要求每个边的和相等。

下图就是一种排法：

9 6

4 8

3 7 5 2

这样的排法可能会有很多。

如果考虑旋转、镜像后相同的算同一种，一共有多少种不同的排法呢？

请你计算并提交该数字。

注意：需要提交的是一个整数，不要提交任何多余内容。

### 解题思路 ###

录入9张纸牌

九张纸牌排序：：：

边长固定为4，求和相等

计算同意情况下---每边4数字相加相等，计数+1

考虑旋转和镜像

![5ce8bbbd69ae1bc5aabb7cb10b4b9119.png][]

计算为一种，则五种情况，加本身，计算六次，计数/6

排序遍历，使用交换排序

循环执行对比，交换操作考虑递归方法、

### 代码实现 ###

package 省赛一轮;
    
    public class 第8届题目3 {
        static int count = 0;
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            int[] arr = {1,2,3,4,5,6,7,8,9};
            f(arr,0,arr.length);
            System.out.println(count/6);
        }
        private static void f(int[] arr, int i, int length) {
            // TODO Auto-generated method stub
            if (i==length) {
                int x = arr[0] + arr[1] + arr[2] + arr[3];
                int y = arr[3] + arr[4] + arr[5] + arr[6];
                int z = arr[6] + arr[7] + arr[8] + arr[0];
                if (x == y && x == z) {
                    count++;
                }            
                return;
            }
            
            for (int j = i; j < length; j++) {
                int n = arr[i];
                arr[i] = arr[j];
                arr[j] =  n; 
                f(arr,i+1,length);
                n = arr[i];
                arr[i] = arr[j];
                arr[j] =  n;
            }
    
    
    
        }
    
    }

输出结果：144

[11_ BigInteger_CLODVEP_-CSDN]: https://blog.csdn.net/m0_73932182/article/details/129255695
[5ce8bbbd69ae1bc5aabb7cb10b4b9119.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/0f40b85a079d4841ae802f0773104a1d.png