Mysterious numbers - 2
Description
The only line of input contains three integers a1, a2, a3 (1 ≤ a1, a2, a3 ≤ 20), separated by spaces.
Output a single integer.
Input
The only line of input contains three integers a1, a2, a3 (1 ≤ a1, a2, a3 ≤ 20), separated by spaces.
Output
Output a single integer.
Samples
2 3 2
5
13 14 1
14
14 5 9
464
17 18 3
53