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: 8643 @ 7199 @ 504 # 8068 # 8187 # 1584 @ 6422

Output: 4929


Input: Consider Input: 3782 @ 4127 # 1265 # 1395 @ 2430 @ 6990 @ 8573 @ 8170

Output: 31412


Input: Consider Input: 6440 @ 6270 @ 4305 # 5049 # 1760 @ 5237 @ 525


Output: 15968