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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int t;
  7. 	cin >> t;
  8. 	while(t--){
  9. 	    int n, l = 0, r = 32;
  10. 	    cin >> n;
  11. 	    for (int i = 0; i < n; i++) {
  12. 	        int a, b;
  13. 	        cin >> a >> b;
  14. 	        l = max(l, a);
  15. 	        r = min(r, b);
  16. 	    }
  17. 	    cout << (l > r ? "NO" : "YES") << endl;
  18. 	}
  19.     return 0;
  20. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin
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1
1
5 6
stdout
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YES
https://ideone.com/agLizg
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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