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

Output: -1324


Input: Consider Input: 2980 - 6793 - 1879 + 5728 - 4199

Output: 10123


Input: Consider Input: 437 - 869 + 9993 + 2713 + 8281 - 5183 - 3998 + 2114 + 3641


Output: -16255