题解

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