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#496 - Next Greater Element I
Problem Description
The next greater element of some element x in an array is the first greater element that is to the right of x in the same array.
You are given two distinct 0-indexed integer arrays nums1 and nums2, where nums1 is a subset of nums2.
For each 0 <= i < nums1.length, find the index j such that nums1[i] == nums2[j] and determine the next greater element of nums2[j] in nums2. If there is no next greater element, then the answer for this query is -1.
Return an array ans of length nums1.length such that ans[i] is the next greater element as described above.
Solution
/**
* @param {number[]} nums1
* @param {number[]} nums2
* @return {number[]}
*/
var nextGreaterElement = function(nums1, nums2) {
return nums1.map(n => {
let index = nums2.indexOf(n);
while (nums2[index] <= n) {
index++;
}
return index >= nums2.length ? -1 : nums2[index];
});
};