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

Ex Output:
7404


Ex Input:
120 # 2644 @ 4589

Ex Output:
2065


Ex Input:
7888 @ 8249 # 1851 # 4622 @ 806 @ 5603 # 2709 # 6155 @ 8553

Ex Output:

15762