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 C++ (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;
 
int solve(int n) { 
    int cnt = 0;
    while (n%2==0) {
      n /= 2;
      cnt++;
    }
    return cnt;
}
 
int main() { 
    int n, check=0,out=1;
    cin >> n;
    for (int i = 1; i <= n; i++) {
      if (check != max(check, solve(i))) {
        out = i;
        check = max(check, solve(i));
      }
      else
        continue;
    }
    cout << out << endl;
    return 0;
}