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: 7640 @ 3347 @ 904

Output: 11891


Input: Consider Input: 1059 # 7372 @ 4733 @ 9323 # 2108 @ 1244 @ 4077 # 7899 # 5842

Output: -2785


Input: Consider Input: 2221 @ 1098 # 6703 @ 1512


Output: -1872