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: 3844 - 5783 + 7487

Output: 2140


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

Output: 2513


Input: Consider Input: 950 - 9596 + 6973 + 5424 + 3072 + 1332 + 6261 - 5356 + 2263


Output: -9423