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: 7312 - 1598 - 5813 - 8994 + 9174 - 4767 + 4076

Output: 15234


Input: Consider Input: 298 + 1699 + 1367 + 5001

Output: -7769


Input: Consider Input: 6518 + 2519 - 9928 + 1421


Output: 12506