#1134Medium· asked at 33 companies
Merge K sorted Lists
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What we know
Example 1
Input: lists = [[1,4,5],[1,3,4],[2,6]] Output: [1,1,2,3,4,4,5,6]
Example 2
Input: lists = [] Output: []
Example 3
Input: lists = [[]] Output: []
Constraints
- •
k == lists.length - •
0 <= k <= 10^4 - •
0 <= lists[i].length <= 500 - •
-10^4 <= lists[i][j] <= 10^4 - •
The sum of all list lengths will not exceed
10^4.