C++ 代码
#include <iostream>
#include <string>
using namespace std;
int main(){
double x;
cin >> x;
string a, b;
cin >> a >> b;
int len = a.size();
double cnt = 0;
for(int i = 0; i < len; i++ ){
if(a[i] == b[i]) cnt ++;
}
double y = cnt/len;
if(y >= x) cout << "yes" << endl;
else cout << "no" << endl;
return 0;
}