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: 6639 - 5724 - 3521 - 6709 - 6185 + 6067 + 9560 - 9829 + 8371

Output: 14609

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

Output: -1201

Input: Consider Input: 7919 - 3299 - 8715 + 6271 - 1 + 4334 - 9880 - 4524
Output: 23733