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: 4062 - 644 + 187 - 4501 + 1736 - 230

Output: 7514


Input: Consider Input: 496 + 5072 + 6259 + 1493 + 4824 + 2052 + 4751 - 8038

Output: -15917


Input: Consider Input: 6750 - 2686 - 859 + 905 - 6473 - 7015 + 508


Output: 22370