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Oct 17th, 2019
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  1. #include "bits/stdc++.h"
  2.  
  3. using namespace std;
  4.  
  5. int mod = 1000007;
  6. int main() {
  7. long long n,m,k;
  8. cin >> n;
  9. int a = 0;
  10. for(int i = 1; i*i<=n; i++)
  11. {
  12. if(n%(i*i) == 0) a=i*i;
  13. }
  14. cout << a;
  15. }
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