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:
2863 @ 9899 # 2358

Ex Output:
10404


Ex Input:
2269 # 7857 @ 1906 @ 1098 # 6308 # 1142 @ 2063

Ex Output:
-7971


Ex Input:
9503 @ 4148 @ 6058 # 8267 @ 7071 @ 7760 # 5373

Ex Output:

20900