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:
6729 # 6577 # 4789 # 6061 # 1189 # 2628 # 6930 @ 3226

Ex Output:
-18219


Ex Input:
9886 # 1880 # 3746 @ 9632 # 721 # 5677 # 1784 # 1010 @ 1201

Ex Output:

5901