def isBalanced(s):
    # Write your code here
    open_bracket = "{[("
    enclose_bracket = "}])"
    pairs = ["{}", "[]", "()"]
    
    if len(s) % 2 != 0:
        return "NO"
    
    if s[0] in enclose_bracket or s[-1] in open_bracket:
        return "NO"
    
    stack = []
    for p in s:
        if p in open_bracket:
            stack.append(p)
        else:
            if len(stack) == 0:
                return "NO"
                
            pair = stack.pop() + p
            if pair not in pairs:
                return "NO"
    
    return "YES"