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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int k, r;
  7. 	cin >> k >> r;
  8.  
  9. 	for(int i = 1; i <= 9; i++){
  10. 		if(((k*i) - r) % 10 == 0 || (k*i) % 10 == 0){
  11. 			cout << i;
  12. 			return 0;
  13. 		}
  14. 	}
  15.  
  16. 	cout << 10;
  17.  
  18. 	return 0;
  19. }
Success #stdin #stdout 0.01s 5392KB
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stdin
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117 3
stdout
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9
https://ideone.com/8aytL0
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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