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:
2448 @ 5284 # 6313 @ 7761 @ 4601 @ 6800

Ex Output:
20581


Ex Input:
3074 @ 9793 # 6587 @ 1399

Ex Output:
7679


Ex Input:
2110 # 2042 @ 5765 @ 3529 @ 9809 @ 4064

Ex Output:

23235