You are given an array of integers. Calculate the sum of its elements.

Input

The i-th line of the input contains an integer ai (0 ≤ a ≤ 1000) — the i-th element of the array. The size of the array is between 1 and 10, inclusive. Note that the size of the array is not given explicitly!

Output

Output a single integer — the sum of the elements of the array.

Examples

Input

2
15
110
3


Output

130


Input

90
0
21
331
45


Output

487

Source: codeforces | Difficulty: HARD


Solutions: