题解

#include <bits/stdc++.h>
using namespace std;
int main(){
double a;
string s1,s2;
cin>>a;
cin>>s1>>s2;
double ans1=min(s1.size(),s2.size());
double ans2=0;
for(int i=0;i<min(s1.size(),s2.size());i++)
if(s1[i]==s2[i]) ans2++;
if(ans2/ans1>a) cout<<"yes"<<endl;
else cout<<"no"<<endl;
return 0;
}