和魏敬*一个老师

#include <iostream>;
#include <bits/stdc++.h>;
using namespace std;
int main(){
double a;
cin>>a;
string v;
string n;
cin>>v>>n;
int sum=0;
for(int i=0;i<v.size();i++){
if(v[i]==n[i]){
sum+=1;
}
}
if(1.0*sum/v.size()>a){
cout<<"yes";
}
else{
cout<<"no";
}
}