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:
2495 @ 7683 @ 706 @ 5746 @ 7998 @ 5941

Ex Output:
30569


Ex Input:
8838 @ 1241 # 4918 # 8353 # 4691 # 5880

Ex Output:

-13763