In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Input: Consider Input: 5137 @ 4207 @ 1156

Output: 10500


Input: Consider Input: 2919 # 2741 @ 497 @ 5230 @ 5250 @ 1797 # 4567 @ 8995 @ 6960

Output: 24340


Input: Consider Input: 5687 # 6841 # 8020 # 2451 @ 6556 @ 4714


Output: -355