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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int t;
  6. 	cin>>t;
  7. 	while(t--){
  8. 		int a,b;
  9. 		cin>>a>>b;
  10. 		int d=a%b;
  11.         if (d==0) cout<<0<<endl;
  12.         else cout<< b-d<<endl;
  13. 	}
  14.     return 0;
  15. }
  16.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
5
10 4
13 9
100 13
123 456
92 46
stdout 
2
5
4
333
0
https://ideone.com/hVzyRN
language:
C++ (gcc 8.3)
created:
10 days ago
visibility:
public

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