zoj 2548 Prerequisites?

//这题属于简单题，只要你有耐心读懂题目就很简单了！#include "iostream"#include "string"#include "memory.h"using namespace std;string chosencourses[110];//已选课程string categorycourses[110];//分类中的课程bool flag[110];int main(){int k, m, c, r, i, j, q, count;while (cin >> k && k){cin >> m;memset(flag, false, sizeof(flag));for (i = 0; i < k; i++)cin >> chosencourses[i];for (i = 0; i < m; i++){cin >> c >> r;count = 0;for (j = 0; j < c; j++){cin >> categorycourses[j];for (q = 0; q < k; q++){if (categorycourses[j] == chosencourses[q])count++;}if (count >= r)flag[i] = true;}}for (j = 0; j < m; j++){if (flag[j] == false){cout << "no" << endl;break;}}if (j == m)cout << "yes" << endl;}}