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: 1887 - 5213 + 516 - 4107 - 7681 - 125 - 1788 + 124 - 1460

Output: 21621


Input: Consider Input: 6800 + 2564 + 8444 + 1912

Output: -6120


Input: Consider Input: 8031 - 9790 + 6692 + 3314 + 9024 - 2865 + 8261


Output: -6605