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: 3894 # 3818 # 2119 # 6333

Output: -8376


Input: Consider Input: 1999 # 5055 @ 6736 # 8829 @ 7010 # 2968 # 259 @ 5904

Output: 4538


Input: Consider Input: 3491 @ 7077 @ 4185 @ 814 @ 2726 # 9000 @ 1374 @ 5985


Output: 16652