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Dec 13th, 2018
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  1. #include <iostream>
  2. #include <string.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. long int a,k=1,m;
  7. cin>>a;
  8. for(int i=1;k<a;i++){
  9. k=i*i;
  10. if(a%k==0) m=k;
  11. }
  12. cout<<m<<endl;
  13. return 0;
  14. }
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