Create Merge K Sorted Lists.java

[jyotidhatarwal]

Merge K Sorted Lists code in java

Constraints
Space complextiy = O(k)
Time complexity = nlogk
where k is the number of lists and n is number of elements across all lists.

Sample input:
4
5
10 20 30 40 50
7
5 7 9 11 19 55 57
3
1 2 3
2
32 39

Sample output:
1 2 3 5 7 9 10 11 19 20 30 32 39 40 50 55 57