programming-challenges Light, more light (110701) 题解

#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <map>
#include <set>
#include <stack>
#include <assert.h>
#include <algorithm>
#include <math.h>
#include <ctime>
#include <functional>
#include <string.h>
#include <stdio.h>
#include <numeric>
#include <float.h>

using namespace std;

int main() {
unsigned u;
while (cin >> u) {
if (u == 0) break;
unsigned uu = sqrt((double)u);
if (uu * uu != u)
cout << "no" << endl;
else
cout << "yes" << endl;
}

return 0;
}