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:
1566 @ 1639 # 814 # 5278 @ 1717 # 4304 # 6735 @ 1407

Ex Output:
-10802


Ex Input:
6514 # 8296 # 4939 # 5783 @ 1077 @ 3237 @ 5941 # 7665 # 2408

Ex Output:
-12322


Ex Input:
7716 @ 6322 @ 6665 # 1281 @ 1377 @ 3345 @ 8318

Ex Output:

32462