#624 - Maximum Distance in Arrays

Medium • View on LeetCode • View on GitHub

Problem Description

You are given m arrays, where each array is sorted in ascending order.

You can pick up two integers from two different arrays (each array picks one) and calculate the distance. We define the distance between two integers a and b to be their absolute difference |a - b|.

Return the maximum distance.

Solution

/**
 * @param {number[][]} arrays
 * @return {number}
 */
var maxDistance = function(arrays) {
  let result = 0;
  let min = arrays[0][0];
  let max = arrays[0][arrays[0].length - 1];

  for (let i = 1; i < arrays.length; i++) {
    const newMin = arrays[i][0];
    const newMax = arrays[i][arrays[i].length - 1];
    result = Math.max(result, Math.abs(newMax - min), Math.abs(max - newMin));
    min = Math.min(min, newMin);
    max = Math.max(max, newMax);
  }

  return result;
};