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: 8324 # 6868 # 6537

Output: -5081


Input: Consider Input: 636 # 9939 @ 3769 @ 8322 # 3343 @ 8680 # 1129 # 9882 # 3400

Output: -6286


Input: Consider Input: 1617 @ 7282 # 6324 # 6535 @ 5186


Output: 1226