题目

本人代码：

#include <bits/stdc++.h>
#define ll long long
using namespace std;
int main() {
    string s;
    getline(cin, s);
    ll count = 0;
    size_t pos = 0;
    while ((pos = s.find("friend", pos)) != string::npos) {
        s.replace(pos, 5, "love");
        pos += 4; 
        count++;
    }

    cout << count << "\n";

    return 0;
}