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  1. #include <iostream>
  2. #include<string>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	// your code goes here
  7. 	string s;
  8.  
  9. 	int k;
  10.  
  11. 	cin >> s >> k;
  12.  
  13. 	int n = s.length();
  14.  
  15. 	int ans = 0;
  16.  
  17. 	for(int i=n-1;i>=0 && k>0;i--)
  18. 	{
  19. 		if(s[i] == '0') {
  20. 			k--;
  21. 		}
  22. 		else {
  23. 			ans++;
  24. 		}
  25. 	}
  26.  
  27. 	if(k==0)
  28. 	{
  29. 		cout<<ans<<endl;
  30. 	} else cout<<n-1<<endl;
  31.  
  32. 	return 0;
  33. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/KupokQ
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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