题解

#include <iostream>
#include <string>
using namespace std;

int main(){
string s,s1;
double f;
cin >> f >> s >> s1;//错了改成getline
int count = 0;
for(int i = 0;i < s.length();i++){
if(s[i] == s1[i]){
count++;
}
}
double rate = double(count)/s.length();
if(rate >= f){
cout << "yes";
}else{
cout<< "no";
}
return 0;
}