题解

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    float n,sum=0.0;
    string a,b;
    cin>>n>>a>>b;
    int x=a.size();
    for(int i=0;i<x;i++){
        if(a[i]==b[i]){
            sum++;
        }
    }
    if(sum/x>=n){
        cout<<"yes";
    }else{
        cout<<"no";
    }
    return 0;
}