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: 7403 - 3327 + 5889 + 1034 + 1607 - 313

Output: 2513


Input: Consider Input: 5501 + 1670 + 376 - 1460


Output: 4915