Your computer engineering instructor gave you a simple task:

Write a program to find the integer mean of three integers ~A~, ~B~, ~C~.

Since you think this is too easy a task for your programming prowess, you've decided to make life more interesting... by computing this simple mean in assembly.

Input Specification

The first line of input will contain ~3~ space-separated integers ~A, B, C~ ~(0 \le A,B,C \le 10)~.

Output Specification

The integer mean of the three integers.

Sample Input

1 2 4

Sample Output

2

Note

To use libc in NASM, the first line of your program should be ; libc. For all others, it should be ; features: libc.