https://leetcode.com/problems/valid-parentheses/ solve by add numbers

valid-parentheses.js

const map = {
  "(": 3n,
  "[": 5n,
  "{": 7n,
  ")": -3n,
  "]": -5n,
  "}": -7n
};

var isValid = function(s) {
  let sum = 0n;
  for (var i = 0; i < s.length; i++) {
    const char = s[i];
    const v = map[char];
    if (v > 0) {
      sum = (sum + v) * v;
    } else {
      const newSum = sum / -v + v;
      if ((newSum - v) * -v !== sum) {
        return false;
      }
        sum = newSum
    }
  }
  return sum == 0;
};