function isBalanced(s) {
    if (s.length % 2 != 0) return "NO"
    const PAIRS = {
        "}": "{",
        "]": "[",
        ")": "("
    }
    const brackets = []

    for (let i = 0; i < s.length; i++) {
        if (!(s[i] in PAIRS)) {
            brackets.push(s[i])
        } else {
            let counterBracket = brackets.pop()
            if (PAIRS[s[i]] !== counterBracket) brackets.push(null)     
        }
    }
    return brackets.length > 0 ? "NO" : "YES"
}