hdu 5198 简单题

Strange Class

#include<stdio.h>#include<string.h>#include<algorithm>using namespace std;char a[15];int main(){//freopen("E:\input.txt", "r", stdin);int b[3];char x, y, z;while ((scanf("%s", a)) != EOF){memset(b, 0, sizeof(b));int len = strlen(a);int flag = 1;if (len % 3 != 0)  //不是3的倍数{printf("NO\n");continue;}x = a[0], y = a[len / 3], z = a[len - 1];if (x == y || y == z || x == z)   //字符串是同一个字母如：aaaa {printf("NO\n");continue;}for (int i = 0; i < len / 3; i++){if (a[i] != x || a[len / 3 + i] != y || a[len - 1 - i] != z)   //判断3段是否相等{printf("NO\n");flag = 0;break;}}if (flag){printf("YES\n");}}return 0;}