#include <iostream>
#include <algorithm>
#include <cstring>
#define int long long
using namespace std;
const int MAXX = 2000001;
int sum = 0;
signed main() {
	int T;
	cin >> T;
	while (T--) {
		cout << "剩余" << T << endl;
		char op;
		scanf("%c", &op);
	}
}

上面的代码只能执行 2次 是怎么回事？