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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. long long a;
  6.  
  7. int main()
  8. {
  9.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  10.     cin >> a;
  11.     if ((long long)(sqrt(a)) == sqrt(a))
  12.         cout << "YES";
  13.     else
  14.         cout << "NO";
  15. }
Success #stdin #stdout 0.01s 5304KB
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stdin
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Standard input is empty
stdout
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YES
https://ideone.com/clYtNr
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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