In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Input: Consider Input: 2673 - 123 - 5121 + 7601 + 976 + 4369 - 4232

Output: -797


Input: Consider Input: 306 + 2346 - 7752 + 7173

Output: -1461


Input: Consider Input: 8667 - 1216 - 8458 + 1698 + 9058 - 2308 - 8474 - 8801 + 6526


Output: 20642