function BracketMatcher(str) {
  const stack = []; // Create an empty stack to keep track of opening brackets
  for (let i = 0; i < str.length; i++) { // Loop through each character in the input string
    if (str[i] === '(') { // If the character is an opening bracket
      stack.push(str[i]); // Push it onto the stack
    } else if (str[i] === ')') { // If the character is a closing bracket
      if (stack.length === 0) { // If the stack is empty, there is no matching opening bracket
        return 0; // Return 0 to indicate the brackets are not matched
      } else {
        stack.pop(); // Otherwise, pop the top element off the stack (the last opening bracket) and discard it
      }
    }
  }
  return stack.length === 0 ? 1 : 0; // If the stack is empty, all opening brackets have been matched, so return 1; otherwise, return 0
}
   
// keep this function call here 
console.log(BracketMatcher(readline()));