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: 2862 - 964 + 1644

Output: 2182


Input: Consider Input: 3677 + 3282 + 6324 + 6039 + 2578 - 7896 + 671 + 4192

Output: -11513


Input: Consider Input: 897 - 398 + 5517 - 5955 - 1456 - 5571 + 2022


Output: 6738