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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5. 	int t,c=0;
  6. 	cin>>t;
  7.  
  8. 	while(t--){
  9. 		c++;
  10. 		string s;
  11. 		cin>>s;
  12. 		int k,ans=0,n=s.length();
  13. 		cin>>k;
  14.  
  15. 		for(int i=0;i<=n-k;i++){
  16. 			if(s[i]=='-'){
  17. 				for(int j=i;j<i+k;j++){
  18. 					if(s[j]=='-'){s[j]='+';}
  19. 					else{s[j]='-';}
  20. 				}
  21. 				ans++;
  22. 			}
  23. 		}
  24. 		bool flag=true;
  25. 		for(int i=0;i<n;i++){
  26. 			if(s[i]=='-'){flag=false;break;}
  27. 		}
  28. 		if(flag){cout<<"Case #"<<c<<": "<<ans<<endl;}
  29. 		else{cout<<"Case #"<<c<<": IMPOSSIBLE"<<endl;}
  30. 	}
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 16056KB
comments (?)
stdin
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3
---+-++- 3
+++++ 4
-+-+- 4
stdout
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Case #1: 3
Case #2: 0
Case #3: IMPOSSIBLE
https://ideone.com/u2ixA9
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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