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

Input: Consider Input: 7944 # 4957 # 8255 @ 684

Output: -4584


Input: Consider Input: 5968 # 833 # 9263 @ 5675 @ 3262 # 2158

Output: 2651


Input: Consider Input: 3038 @ 154 @ 7957 @ 3402


Output: 14551