参考答案：

#include<iostream>
#include <cctype>
#include<string>
using namespace std;
int main()
{
    string s;
    int n, sum = 0;
    cin >> n;
    int m = n;
    while (n--)
    {
        cin >> s;
        if (s.find("xfxcy") != -1) ++ sum;
    }
    cout << sum << '\n';
    return 0;
}