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: 4195 + 6940 - 1053 - 4433 + 1540

Output: 1201


Input: Consider Input: 8213 + 7145 + 5203 - 2621 + 1654 - 1844

Output: -1324


Input: Consider Input: 3116 + 9738 - 3314


Output: -3308