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:
8441 @ 2924 # 9024 @ 6661 @ 7034 # 4821 # 4921

Ex Output:
6294


Ex Input:
3782 @ 4127 # 1265 # 1395 @ 2430 @ 6990 @ 8573 @ 8170

Ex Output:
31412


Ex Input:
2898 @ 3584 # 2141 @ 9779

Ex Output:

14120