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: 4449 @ 4019 @ 7637

Output: 16105


Input: Consider Input: 8625 # 2240 # 8544 @ 9905 @ 7588 @ 9161 @ 3204 @ 4214 # 1175

Output: 30738


Input: Consider Input: 2845 # 4949 # 2665 @ 5560 # 9421 # 261 @ 8489 @ 925 # 8900


Output: -8377