E. A+B
time limit per test
1 second
memory limit per test
64 MB
input
standard input
output
standard output

You are given N numbers Ai. You are required to find the sum of Ai. 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.

Input

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

Output

Calculate the sum of Ai.

Example
Input
23 3 12 7
Output
42