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:
1221 @ 4619 # 3319 @ 2958

Ex Output:
5479


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

Ex Output:
6207


Ex Input:
1424 @ 2074 @ 5414 # 5682 # 139 @ 9478 @ 3363

Ex Output:

15932