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| 1 | #include <iostream> | |
| 2 | using namespace std; | |
| 3 | const int MAX=255; | |
| 4 | char a[MAX], s[MAX]; | |
| 5 | int k=0; | |
| 6 | int main() {
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| 7 | cin>>s; | |
| 8 | for(int i = 0; i <strlen(s); i++) {
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| 9 | if ((s[i]=='(' || s[i]=='[' || s[i]=='{') && k<MAX) a[++k]=s[i];
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| 10 | if ((s[i]==')' && a[k]=='(' || s[i]==']' && a[k]=='[' || s[i]=='}' && a[k]=='{') && k>=1) k--;
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| 11 | } | |
| 12 | - | if (k) cout<<"no"; else cout<<"yes"; |
| 12 | + | if (k==0) cout<<"no"; else cout<<"yes"; |
| 13 | return 0; | |
| 14 | } |
