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:
1062 @ 9466 @ 4653

Ex Output:
15181


Ex Input:
1122 @ 3359 @ 4856 # 8802 @ 600 @ 3512 # 4067 @ 6320 @ 711

Ex Output:

7611