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:
3074 @ 9793 # 6587 @ 1399

Ex Output:
7679


Ex Input:
7640 @ 3347 @ 904

Ex Output:
11891


Ex Input:
5192 @ 7822 @ 3907 # 785 @ 2389 # 1641 # 7494

Ex Output:

9390