C++ 代码
#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
while(cin >> n){
int flag = 1;
for(int i = 2; i < n; i ++){
if(n % (i*i) == 0){
cout << "Yes" << "\n";
flag = 0;
break;
}
}
if(flag == 1)
cout << "No" << "\n";
}
return 0;
}