Problem Link-
https://www.codechef.com/problems/PPSUM
Solution Link-
https://decencytopeak.wordpress.com/2021/10/25/puppy-and-sum/
Telegram Channel Link-
https://t.me/joinchat/pZ-rqIWg4CJiOWQ1
============================================
Yesterday, puppy Tuzik learned a magically efficient method to find the sum of the integers from 1 to N. He denotes it as sum(N). But today, as a true explorer, he defined his own new function: sum(D, N), which means the operation sum applied D times: the first time to N, and each subsequent time to the result of the previous operation.
For example, if D = 2 and N = 3, then sum(2, 3) equals to sum(sum(3)) = sum(1 + 2 + 3) = sum(6) = 21.
Tuzik wants to calculate some values of the sum(D, N) function. Will you help him with that?
Input
The first line contains a single integer T, the number of test cases. Each test case is described by a single line containing two integers D and N.
Output
For each testcase, output one integer on a separate line.
Constraints
1 ≤ T ≤ 16
1 ≤ D, N ≤ 4
Sample Input 1
2
1 4
2 3
Sample Output 1
10
21
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