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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void solve() {
  5. 	string x, y;
  6. 	cin >> x >> y;
  7. 	int a = stoi(x);
  8. 	int b = stoi(y);
  9. 	if (a == b) {
  10. 		cout << "NO" << endl;
  11. 		return;
  12. 	}
  13. 	if (a + 1 == b) {
  14. 		cout << "YES" << endl;
  15. 		return;
  16. 	}
  17. 	if (b == 1) {
  18. 		if (a % 9 == 0) {
  19. 			cout << "YES" << endl;
  20. 		} else {
  21. 			cout << "NO" << endl;
  22. 		}
  23. 	} else {
  24. 		if (b > a) {
  25. 			cout << "NO" << endl;
  26. 			return;
  27. 		}
  28. 		if ((a - b - 1) % 9 == 0) cout << "YES" << endl;
  29. 		else cout << "NO" << endl;
  30. 	}
  31. }
  32.  
  33. int main() {
  34. 	int t;
  35. 	cin >> t;
  36. 	while (t--) solve();
  37. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
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7
1 2
77 77
997 999
999 1
1000 1
1 11
18 1
stdout
copy 
YES
NO
NO
YES
NO
NO
YES
https://ideone.com/JY5z7o
language:
C++14 (gcc 8.3)
created:
11 days ago
visibility:
public

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