GeezerVison

The World Wide Web, restored to 800 pixels of glory.

GeezerVison is showing leetcodejavascript.com — #163 - Missing Ranges - LeetCode JavaScript Solutions

#163 - Missing Ranges

Easy • View on LeetCode • View on GitHub

Problem Description

You are given an inclusive range [lower, upper] and a sorted unique integer array nums, where all elements are within the inclusive range.

A number x is considered missing if x is in the range [lower, upper] and x is not in nums.

Return the shortest sorted list of ranges that exactly covers all the missing numbers.

That is, no element of nums is included in any of the ranges, and each missing number is covered by one of the ranges.

Solution

/**
 * @param {number[]} nums
 * @param {number} lower
 * @param {number} upper
 * @return {number[][]}
 */
var findMissingRanges = function(nums, lower, upper) {
  const result = [];
  let prev = lower - 1;

  for (let i = 0; i <= nums.length; i++) {
    const curr = i < nums.length ? nums[i] : upper + 1;
    if (curr - prev > 1) {
      result.push([prev + 1, curr - 1]);
    }
    prev = curr;
  }

  return result;
};

You are visitor 01402503 — GeezerVison does not store the pages you look up.
Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.