题解

#include <bits/stdc++.h>
using namespace std;
int main(){
string a,b;
double c,s=0.0;
int sum=0;
cin>>c;
cin>>a>>b;
int len=a.length(); //字符串长度
for(int i=0;i<len;i++){ //遍历找相同
if(a[i]==b[i]){
sum++;
}
}
s=sum1.0/len1.0; 求阈值
if(s>=c){
cout<<"yes";
}else{
cout<<"no";
}
return 0;
}