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: 4515 - 2156 - 8427 - 2175

Output: 17273


Input: Consider Input: 7053 - 797 + 1011 - 43 - 2798 - 1572 - 4498

Output: 15750


Input: Consider Input: 4996 - 9544 - 3443 - 9073 + 7083 - 6887 - 6631 + 5693 - 3628


Output: 31426