超简单字符串

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