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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int n,top=0;
  4. int main(){
  5. 	scanf("%d",&n);
  6. 	string s;
  7. 	cin>>s[++top];
  8. 	for(int i=2;i<=n;i++){
  9. 		char a;
  10. 		scanf("%c",&a);
  11. 		if(a==s[top]) top--;
  12. 		else s[++top]=a;
  13. 	}
  14. 	if(top!=0) for(int i=1;i<=top;i++) cout<<s[i];
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
9
acccabddb
stdout 
aca
https://ideone.com/VqTTNw
language:
C++ (gcc 8.3)
created:
16 hours ago
visibility:
public

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