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:
2560 @ 144 @ 6785 @ 572 # 5190 @ 1929

Ex Output:
6800


Ex Input:
1864 @ 8830 # 8139 # 5532 @ 9493 # 2897 # 3370 @ 2698 @ 3260

Ex Output:
6207


Ex Input:
91 @ 5184 # 2180

Ex Output:

3095