def isBalanced(s):
    stack = []
    open_to_close = {"{": "}", "[": "]", "(": ")"}
    for bracket in s:
        # Open bracket case
        closing_bracket = open_to_close.get(bracket)
        if closing_bracket:
            stack.append(closing_bracket)
        # Close bracket case
        elif not stack or bracket != stack.pop():
            return "NO"
    
    # If we have looped through the entire string and the stack is empty, all opening brackets were closed
    return "NO" if stack else "YES"