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  1. #include <iostream>
  2. #include <map>
  3.  
  4. int main() {
  5. 	std::map<int, int> m;
  6. 	m[1] = 1;
  7. 	m[2] = 2;
  8. 	// m[3] = 3;
  9. 	m[4] = 4;
  10. 	m[5] = 5;
  11.  
  12. 	auto val = 3;
  13. 	auto next = m.upper_bound(val);
  14. 	if (next != std::begin(m)) {
  15. 		auto cur = prev(next);
  16.  
  17. 		std::cout << cur->first << std::endl;
  18. 	}
  19.  
  20. 	return 0;
  21. }
Success #stdin #stdout 0.01s 5500KB
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stdin 
Standard input is empty
stdout 
2
https://ideone.com/xXJw1Y
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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