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

Ex Input:
9645 @ 911 @ 6748 # 3005 # 3625 # 87 @ 3003 # 5587 # 1382

Ex Output:
6621


Ex Input:
4470 @ 7285 # 4583 @ 9451 # 3236 # 3108 # 2875

Ex Output:
7404


Ex Input:
3773 @ 4169 @ 9858 # 8083 # 112 # 1991 @ 6103 @ 2384 # 2704

Ex Output:

13397


