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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5. 	int t;
  6. 	cin>>t;
  7. 	while(t--){
  8. 		int n,k;
  9. 		cin>>n>>k;
  10. 		int a[10000],s=0;
  11. 		for ( int i=2;i<=sqrt(n);i++){
  12. 			while(n%i==0){
  13. 				a[s]=i;
  14. 				s++;
  15. 				n=n/i;
  16. 			} 
  17. 		}
  18. 		if(n>1){
  19. 			a[s]=n;
  20.  
  21. 		} 
  22. 		if(a[k-1]!=0) cout<<a[k-1]<<endl;
  23. 		else cout<<"-1"<<endl;
  24. 	}
  25. 	}
Success #stdin #stdout 0s 5304KB
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https://ideone.com/DT6Xsd
language:
C++ (gcc 8.3)
created:
36 days ago
visibility:
public

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