Problem:
Score : 100 points

Problem Statement

This contest, AtCoder Beginner Contest, is abbreviated as ABC.

When we refer to a specific round of ABC, a three-digit number is appended after ABC. For example, ABC680 is the 680th round of ABC.

What is the abbreviation for the N-th round of ABC? Write a program to output the answer.

Constraints

100 ≤ N ≤ 999

Input

Input is given from Standard Input in the following format:

N

Output

Print the abbreviation for the N-th round of ABC.

Sample Input 1

100

Sample Output 1

ABC100

The 100th round of ABC is ABC100.

Sample Input 2

425

Sample Output 2

ABC425

Sample Input 3

999

Sample Output 3

ABC999

Solution in Ruby (2.3.3) (judge verdict: Wrong Answer)

N = gets.to_i
 
max_count = 0
max_count_num = 1
for s in 1..N do
  count = 0
  num = s
  while (num % 2 == 0) do
    num /= 2
    count += 1
  end
 
  if (count > max_count)
    max_count = count
    max_count_num = s
  end
end
 
puts max_count_num