基因相关性

#include<bits/stdc++.h>
using namespace std;
const int N=600;
char s1[N],s2[N];
int main()
{
    double m,n;
    cin>>m;
    cin>>s1>>s2;
    double l=strlen(s1);
    for(int i=0;i<l;i++)
    {
        if(s1[i]==s2[i])
        {
            n+=1;
        }
    }
    double c=n/l;
    if(c>=m)
    {
        cout<<"yes";
    }
    else
    {
        cout<<"no";
    }
    return 0;
}