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: 6472 # 6421 @ 7649 @ 4005

Output: 11705


Input: Consider Input: 4039 # 2314 # 8257 # 5828 @ 2387 @ 4250 @ 5479 # 991

Output: -1235


Input: Consider Input: 2560 @ 144 @ 6785 @ 572 # 5190 @ 1929


Output: 6800