虽然很简单但却是map很典型的运用，姑且就放上来吧。

 

代码实现如下：

#include 
      
       using namespace std;#define rep(i, a, b) for (register int i = (a); i <= (b); i++)map
       
         a;int n, m;string s;int main() {    std::ios::sync_with_stdio(false);    std::cin.tie(0);    cin >> n;    rep(i, 1, n) {        cin >> s;        a[s] = 1;    }    cin >> m;    rep(i, 1, m) {        cin >> s;        if (a[s] == 1) {            printf("OK\n");            a[s] = 2;            continue;        }        if (a[s] == 2) printf("REPEAT\n");        if (!a[s]) printf("WRONG\n");    }    return 0;}