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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	// your code goes here
  7.  
  8. 	vector<int> arr = {3,5,5,8,8,10,12};
  9.  
  10. 	int ub = 6;
  11.  
  12. 	int ans =0;
  13. 	int st=0, end=arr.size()-1;
  14.  
  15. 	while( st<=end){
  16.  
  17. 		int m = st+ (end-st)/2;
  18.  
  19. 		if(arr[m]<=ub){
  20. 			st=m+1;
  21. 		}
  22. 		else{
  23. 			if(m==0){
  24. 				ans=m;
  25. 				break;
  26. 			}
  27. 			else if(arr[m-1]<ub){
  28. 				ans = m;
  29. 				break;
  30. 			}
  31. 			else{
  32. 				end = m-1;
  33. 			}
  34. 		}
  35. 	}
  36.  
  37. 	cout<< ans;
  38.  
  39. 	auto mg = upper_bound(arr.begin(), arr.end(), ub);
  40. 	cout<< endl << *mg;
  41. 	cout<< endl << *arr.begin();
  42. 	cout << endl<< mg - arr.begin();
  43.  
  44. 	return 0;
  45. }
Success #stdin #stdout 0.01s 5320KB
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3
8
3
3
https://ideone.com/b4vFbn
language:
C++14 (gcc 8.3)
created:
11 hours ago
visibility:
public

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