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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4.     int main() {
  5.     string s;
  6.     stack < char > st;
  7.     bool was  = true;
  8.     int ans = 0;
  9.  
  10.   cin >> s;
  11.   int i = 0;
  12.    while (i < s.size()){
  13.       if (s[i] != '(' && s[i] != '{' && s[i] != '[' && s[i] != '<') 
  14.         s.erase(i,1), i--;
  15.         else
  16.       if (s[i] != ')' && s[i] != '}' && s[i] != ']' && s[i] != '>') 
  17.       s.erase(i,1), i--;
  18.     	cout << s << endl;  
  19.       i++;
  20.     }
  21.  
  22.     for (int i = 0; i < s.size(); i++){
  23.  
  24.       if (s[i] == '(' || s[i] == '{' || s[i] == '[' || s[i] == '<') st.push(s[i]);
  25.  
  26.       else
  27.       if (!st.empty() && s[i] == ')' && st.top() == '(' )
  28.         st.pop();
  29.       else
  30.       if (!st.empty() && s[i] == '}' && st.top() == '{' )
  31.         st.pop();
  32.       else
  33.       if (!st.empty() &&s[i] == ']' && st.top() == '[')
  34.         st.pop();
  35.       else
  36.         if (!st.empty() && s[i] == '>' && st.top() == '<')
  37.           st.pop();
  38.       else
  39.         was = false;   
  40.  
  41.       } 
  42.  
  43.  
  44.   if (was == false) cout << "NO", exit(0);
  45.  
  46.   if (st.empty())
  47.     cout << "YES" ;
  48.   else
  49.      cout << "NO";
  50.  }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
<()asd[]asd>asd
stdout
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()asd[]asd>asd
)asd[]asd>asd
asd[]asd>asd
sd[]asd>asd
d[]asd>asd
[]asd>asd
]asd>asd
asd>asd
sd>asd
d>asd
>asd
asd
sd
d

YES
https://ideone.com/AAhbPx
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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