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: 6368 + 9565 - 7042 - 1940 - 9960

Output: 15745


Input: Consider Input: 42 + 6517 - 146 + 304 - 4759 + 148 - 3822

Output: 1800


Input: Consider Input: 8455 + 5516 - 2131 + 6151 + 6314 + 9308 + 5493


Output: -22196