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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5.  
  6. int findOptimal(string &s) {
  7. 	s += '0'; // add a sentinel 0
  8. 	int best_zero = -1;
  9. 	int prev_zero = -1;
  10. 	int zeros_in_interval = 0;
  11. 	int start = 0;
  12. 	int best_answer = -1;
  13. 	for(int i = 0; i < (int)s.length(); ++i) {
  14. 		if(s[i] == '1') continue;
  15. 		else if(s[i] == '0' and  zeros_in_interval == 0) {
  16. 			zeros_in_interval++;
  17. 			prev_zero = i;
  18. 		}
  19. 		else if(s[i] == '0' and zeros_in_interval == 1) {
  20. 			int curr_answer =  i - start; // [start, i) only contains one 0
  21. 			cout << "tried this : [" << s.substr(start, i - start) << "]\n";
  22. 			if(curr_answer > best_answer) {
  23. 				best_answer = curr_answer;
  24. 				best_zero = prev_zero;
  25. 			}
  26. 			start = prev_zero + 1;
  27. 			prev_zero = i;
  28. 		}
  29. 	}
  30. 	cout << "Answer = " << best_zero << endl;
  31. 	return best_zero;
  32. }
  33. int main() {
  34. 	string input = "011101101001";
  35. 	findOptimal(input);
  36.  	return 0;
  37. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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tried this : [0111]
tried this : [111011]
tried this : [1101]
tried this : [10]
tried this : [01]
Answer = 4
https://ideone.com/N8bznU
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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