Saturday, November 5, 2016

UVA 10110 - Light, more light

#include<bits/stdc++.h>
#define sf scanf
#define pf printf
#define LL long long
#define REP(i,MAX) for(LL i = 0; i<MAX; i++)
#define MAX 10000000+10
using namespace std;
int main()
{
    ios_base::sync_with_stdio(false);
    long long n;
    while(cin >> n && n){
    floor(sqrt(n)) == ceil(sqrt(n)) ? cout<<"yes\n":cout <<"no\n";
    }

 return 0;
}

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