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: 8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912

Output: 4011


Input: Consider Input: 1256 - 3248 - 3709 - 3019

Output: 11232


Input: Consider Input: 3542 + 5759 + 1965


Output: -4182