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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. 		int n;
  9. 		cin>>n;
  10. 		string s;
  11. 		cin>>s;
  12. 		int count1=0;
  13. 		int count2=0;
  14. 		int sum=0;
  15. 		for(int i=0;i<n;i++){
  16. 			if(s[i]=='1'){
  17. 				count1++;}
  18. 				else{
  19. 					break;
  20. 				}}
  21. 				for(int j=count1;j<n;j++){
  22. 					if(s[j]=='1'){
  23. 						count2++;
  24. 					}
  25. 					else{
  26. 						count2=0;
  27.  
  28. 					}
  29. 					 sum=max(sum,count2);
  30.  
  31.  
  32. 				}
  33. 				cout<<count1+sum<<endl;
  34.  
  35.  
  36.  
  37.  
  38. 	}}
  39.  
  40.  
  41.  
  42.  
  43.  
  44.  
  45.  
  46.  
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  48.  
  49.  
  50.  
Success #stdin #stdout 0.01s 5516KB
comments (?)
stdin
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3
4
1010
6
011011
11
01011011101
stdout
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2
2
3
https://ideone.com/sj7761
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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