comefrom: <awangdev>301. Remove Invalid Parentheses_3.java
code: private boolean validate(String s) {
  
          int count = 0;
          for (char c : s.toCharArray()) {
              count += c == '(' ? 1 : 0;
              count -= c == ')' ? 1 : 0;
              if (count < 0) return false;
          }
          return count == 0;
      }
masked: private boolean var_0 ( String var_2 ) {
    int var_4 = 0 ;
    for ( char var_6 : var_2 . toCharArray ( ) ) {
      var_4 += var_6 == '(' ? 1 : 0 ;
      var_4 -= var_6 == ')' ? 1 : 0 ;
      if ( var_4 < 0 ) return false ;
    }
    return var_4 == 0 ;
  }
  