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: 3097 + 17 - 8842 + 4949 + 8377 + 425 - 7128 + 6500

Output: -1201


Input: Consider Input: 5175 - 1386 - 5328 - 898 + 5361 - 376 + 1286 + 861

Output: 5655


Input: Consider Input: 242 - 8476 - 5011 - 8468


Output: 22197