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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. void print(int n)
  5. {
  6. 	int mask = 1<<30, cnt = 31;
  7. 	cout<<mask<<" "<<n<<endl;
  8. 	while(cnt--)
  9. 	{
  10. 		if(n & mask)
  11. 			cout<<"1 ";
  12. 		else
  13. 			cout<<"0 ";
  14. 		mask = mask>>1;
  15. 	}
  16. 	cout<<endl;	
  17. }
  18.  
  19. void flipSecMSB(int n)
  20. {
  21. 	print(n);
  22.  
  23. 	int mask = 1<<30, cnt = 31; bool foundMSB=false;
  24. 	while(cnt--)
  25. 	{
  26. 		if(n & mask)
  27. 		{
  28. 			if(foundMSB)
  29. 			{
  30. 				n = n ^ mask;
  31. 				break;
  32. 			}
  33. 			else
  34. 				foundMSB = true;
  35. 		}
  36. 		mask = mask>>1;
  37. 	}
  38. 	print(n);
  39. }
  40.  
  41. int main() {
  42. 	// your code goes here
  43. 	flipSecMSB(8);
  44. 	flipSecMSB(255);
  45.  
  46. 	return 0;
  47. }
Success #stdin #stdout 0s 3140KB
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stdin
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Standard input is empty
stdout
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1073741824 8
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 
1073741824 8
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 
1073741824 255
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 
1073741824 191
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 1 1
https://ideone.com/E3BGuE
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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