Sum of List

Given a count N followed by N numbers (one per line), print their sum.

Input

• The first line contains an integer N (1 <= N <= 2·10^4).
• The next N lines each contain one integer between -10^9 and 10^9.

Output

Print the sum of the N numbers.

Examples

Input:
3
10
20
30
Output: 60

Input:
4
1
2
3
4
Output: 10

Input:
1
42
Output: 42

With N = 1, the sum is just that single number.

Input:
3
-5
-10
15
Output: 0