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: 2787 @ 3800 # 142 # 7750 # 8581 @ 5447 @ 1512 @ 6550

Output: 3623


Input: Consider Input: 2738 # 5562 @ 4529 @ 5438 @ 1799

Output: 8942


Input: Consider Input: 3591 @ 5819 # 8713


Output: 697


