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: 344 - 7553 + 7224 + 1616 + 672 + 916

Output: -2531


Input: Consider Input: 4993 - 9334 - 5415 + 8531 - 5640 + 896 + 3114 - 1984

Output: 14825


Input: Consider Input: 462 - 2972 - 2044 - 648 + 829


Output: 5297