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: 1566 @ 1639 # 814 # 5278 @ 1717 # 4304 # 6735 @ 1407

Output: -10802


Input: Consider Input: 5027 @ 4058 # 8225 @ 9216 # 3101 @ 8259 # 2376 # 6826 # 8997

Output: -2965


Input: Consider Input: 9790 # 1759 @ 266 @ 2561


Output: 10858