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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n=0;
    scanf("%d", &n);
    int maxnum=0;
    int max=-1;
    for(int i=1;i<=n;i++){
        int sum=0;
        int pres=i;
        while(pres%2==0){
            sum+=1;
            pres/=2;
        }
        if (sum>max){
            maxnum=i;
            max=sum;
        }
    }
    printf("%d", maxnum);
}