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  1. Prepare
  2. Data Structures
  3. Stacks
  4. Balanced Brackets
  5. Discussions

Balanced Brackets

  • cloricco13
     + 3 comments

    Something must be wrong with the compiler, or something is happening behind the scenes. I have some code that is failing 3 cases, but when I unlock the test case and run the input as a custom case it passes just fine.

    (I have a correct solution already, but my friend wanted me to try out this other solution)

     const stack = [];
    let i = 0;
    while (i <= s.length) {
        switch (s[i]) {
            case "(": 
            case "[": 
            case "{": 
                stack.push(s[i]); 
                break;
            case ")": 
                if (stack.pop() !== "(") return "NO"; 
                break;
            case ']': 
                if (stack.pop() !== "[") return "NO"; 
                break;
            case '}': 
                if (stack.pop() !== "{") return "NO";
                break;
        }
												
												
        i++
    }
												return "YES"

    • jurgen_wohllk
       + 0 comments

      you need to validate this case '{{}' when the stack length is > 0 because there are more opening brackets than the closing ones

      function isBalanced(s) {
  const stack = [];
  let i = 0;
  while (i <= s.length) {
    switch (s[i]) {
      case "(":
      case "[":
      case "{":
        stack.push(s[i]);
        break;
      case ")":
        if (stack.pop() !== "(") return "NO";
        break;
      case "]":
        if (stack.pop() !== "[") return "NO";
        break;
      case "}":
        if (stack.pop() !== "{") return "NO";
        break;
    }

    i++;
  }
  if (stack.length > 0) return "NO";
  return "YES";
}

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