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 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>

int main()
{	int num_n, num_m;
	int i, j;

	int **route;

	scanf("%d %d\n", &num_n, &num_m);

	route = (int **) malloc(sizeof(int*) * num_m);
	fflush(stdin);

	for (i = 0; i < num_m; i++) {

		route[i] = (int *) malloc(sizeof(int) * 2);
		scanf("%d %d\n", &route[i][0], &route[i][1]);
		fflush(stdin);

	}

	for (i = 0; i < num_m; i++) {

		if (route[i][0] == 1)
			for (j = 0; j < num_m; j++)
				if ((route[j][1] == num_n) && (route[i][1] == route[j][0])) {
					printf("POSSIBLE");
					return 0;
				}
	}
	printf("IMPOSSIBLE");

	return 0;
}