C++ 代码

#include<iostream>
#include<cstring>
using namespace std;
int main()
{
    double k;
    string s1,s2;
    int count=0;
    cin>>k>>s1>>s2;
    for(int i=0;i<min(s1.size(),s2.size());i++)
        if(s1[i]==s2[i])
        count++;
        if((double)count*2/(s1.size()+s2.size())>=k)
        cout<<"yes";
        else cout<<"no";
        return 0;
}