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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 		int t;
  6. 		cin >> t;
  7. 		while(t--)
  8. 		{
  9. 			int n,c=0,d=0;
  10. 			cin >> n;
  11. 			string s;
  12. 			cin >> s;
  13. 			for(int i=0;i<n-1;i++)
  14. 			{
  15. 				if((s[i]=='0' && s[i+1]== '1'))
  16. 				{
  17. 				c++;
  18. 				}
  19. 				else if((s[i]=='1' && s[i+1]== '0'))
  20. 				{
  21. 					d++;
  22. 				}
  23. 			}
  24. 			int a = min(c,d);
  25. 			cout << a << endl;
  26. 		}
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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5
5
0 0 1 1 1
1
0
5
1 1 0 0 1
2
1 0
5
1 0 1 0 1
stdout
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0
0
0
0
0
https://ideone.com/H7lF6b
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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