Problem link - https://www.codechef.com/NOV11/problems/NEWREST
take this test case
N=4 M=3 K=2
let’s say the chef knows three types of dishes A, B, and C, now chef can select two dishes and choose which dish he wants to cook on ith day
so the answer should be 3 * (2 * 2 * 2 * 2) = 48.
Here is the picture of all the cases,
the answer for this test case in the problem is given 45