881.js

/** ------------------------------------------------------------------------------
 * 
 * 2023-04-03
 * Boats to Save People
 * https://leetcode.com/problems/boats-to-save-people/
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {number[]} people
 * @param {number} limit
 * @return {number}
 */

const numRescueBoats = (people, limit) => {
  let boats = 0;
  let left = 0;
  let right = people.length - 1;
  people.sort((a, b) => a - b);

  while (left <= right) {
    boats++;
    if (people[left] + people[right] <= limit) {
      left++;
    }

    right--;
  }

  return boats;
};

console.log(numRescueBoats([1, 2], 3));