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: 3672 + 2445 + 4715 - 5145 - 8515 + 3793 - 3753

Output: 10132


Input: Consider Input: 8571 - 5985 + 8912

Output: 5644


Input: Consider Input: 5010 - 2117 + 6121 - 6244 + 1089 + 5871


Output: 290