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:
2186 # 2436 # 4269 # 2175 @ 4101 # 2723 @ 6192 # 7530

Ex Output:
-6654


Ex Input:
445 # 5783 # 3236 # 9634 # 2299 # 2757 @ 3895 @ 5353 # 5757

Ex Output:
-19773


Ex Input:
9097 @ 3407 # 9529 # 1892 @ 6172 @ 8398 # 1328 # 8075

Ex Output:

6250