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: 961 + 1754 - 8392 + 2659 - 495 + 358

Output: 5077

Input: Consider Input: 2181 + 397 + 8824 - 2945 + 612 + 9971 + 1036 - 7693

Output: -8021

Input: Consider Input: 4261 - 140 + 4266 + 456 - 4096 - 7876
Output: 11651