You are given N numbers A_i. You are required to find the sum of A_i. Unfortunately, the numbers in the input were mixed up in such way that the number N is not necessarily the first number of the input.

The first line contains the numbers X_i (0 ≤ X_i ≤  50). The amount of numbers in the input is not greater than 50. Among these numbers are the number N and the numbers A_i.

Calculate the sum of A_i.