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Problems

2^k + 2^n

2^k + 2^n

Two different integers k and n are given. Print the value 2k + 2n, using bit operations only.

Input

Two different integers k and n (0k, n30).

Output

Print the number 2k + 2n.

Time limit 1 second
Memory limit 64 MiB
Input example #1
0 1
Output example #1
3
Source 2010 LKSH Berendevy Polyany, August, Parallel C, Day 1, Problem A