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: 7534 @ 7329 # 2862 # 947 @ 8590 @ 4064

Output: 23708


Input: Consider Input: 6942 @ 1857 @ 1508 @ 3059 # 6727

Output: 6639


Input: Consider Input: 8503 # 4096 @ 6612 # 4331 # 2387 @ 6864 # 7606 # 6310


Output: -2751