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: 7376 @ 9212 @ 1713 # 9993

Output: 8308


Input: Consider Input: 5052 # 6923 @ 1011

Output: -860


Input: Consider Input: 8059 # 9510 # 4688 @ 1517


Output: -4622