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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define GG ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
  4. int main () { GG;
  5. int t; cin>>t;
  6. while(t--) {
  7. int n; string s;
  8. cin>>n>>s;
  9. stack<char> st;
  10.  
  11. for(int i=0;i<n;i++)
  12. {	if(st.empty())
  13. 	st.push(s[i]);
  14. 	else if(s[i]== st.top())
  15. 	st.push(s[i]);
  16. 	else
  17. 	st.pop();
  18. }
  19. cout<<st.size()<<"\n";
  20. }return 0;}
Success #stdin #stdout 0.01s 5296KB
comments (?)
stdin
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5
1
+
5
-----
6
+-+-+-
10
--+++++++-
20
+---++++-+++++---++-
stdout
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1
5
0
4
4
https://ideone.com/W4iGdX
language:
C++ (gcc 8.3)
created:
14 days ago
visibility:
public

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