题解

#include<bits/stdc++.h>
using namespace std;
int main(){
double aa;
cin>>aa;
string a,b;
cin>>a>>b;
int c=0;
for(int i=0;i<a.length();i++){
if(a[i]==b[i]){
c++;
}
}
if(double(c)/a.length()>=aa)cout<<"yes";
else cout<<"no";
return 0;
}