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: 9930 # 7864 @ 6797 # 6092 @ 1146 @ 1388 # 8545 # 9163

Output: -12403


Input: Consider Input: 5253 @ 2450 @ 1316 @ 9889 @ 6449 @ 4948

Output: 30305


Input: Consider Input: 7321 @ 480 # 3203


Output: 4598


