#include<iostream>
#include<string>
#include<map>
using namespace std;
int main() {
	int n, M; string s; 
	while (cin >> n) {
		map<string, int>m;
		for (int i = 0; i < n; i++) {
			cin >> s; m[s] = 0;
		}
		cin >> M;
		for (int i = 0; i < M; i++) {
			cin >> s;
			if (m.find(s) != m.end()) {
				if (m[s] == 0) {
					m[s]++; cout << "OK" << endl;
				}
				else cout << "REPEAT" << endl;
			}
			else
				cout << "WRONG" << endl;
		}
	}
}

为什么这玩意会超时呢？

二编：好消息，超时解决了

坏消息，tmd爆内存了

#include<iostream>
#include<cstring>
#include<string>
#include<map>
using namespace std;
string read() {
	string temp;
	char c = getchar();
	while (c != '\n')
		temp += c;
	return temp;
}
int main() {
	int n, M; string s;
	while (cin >> n) {
		map<string, int>m;
		for (int i = 0; i < n; i++) {
			s = read();
			m[s] = 0;
		}
...