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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. typedef long long int ll;
  4. using namespace std;
  5.  
  6. int main() {
  7. 	ll queries, kids, candy, resp;
  8. 	cin>>queries;
  9. 	for(int i=0;i<queries;i++){
  10. 		cin>>candy>>kids;
  11. 		if(candy%kids<(kids/2)){
  12. 			resp=candy%kids;
  13. 		}
  14. 		else{
  15. 			resp=kids/2;
  16. 		}
  17. 		resp+=(candy/kids)*kids;
  18. 		cout<<resp<<endl;
  19. 	}
  20. 	return 0;
  21. }
Success #stdin #stdout 0s 4372KB
comments (?)
stdin
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5
5 2
19 4
12 7
6 2
100000 50010
stdout
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5
18
10
6
75015
https://ideone.com/z6tFVA
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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