D. ASZoo Animals
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

There are a lot of animals in ASZoo, and each kind of animal has a family.

There is $$$n$$$ kind of animals, each kind has $$$a_i$$$ family member, count how many animals in the Zoo.

Input

The first line of input consists of a single integer $$$n$$$ ($$$1 \le n \le 100$$$).

The second line of input consists of $$$n$$$ integers $$$a_1, a_2, ... a_n$$$ ($$$1 \le a_i \le 100$$$).

Output

Print the answer.

Examples
Input
4
3 1 2 5
Output
11
Input
1
6
Output
6
Input
3
1 1 1
Output
3