Problem:
Score : 100 points

Problem Statement

On some day in January 2018, Takaki is writing a document. The document has a column where the current date is written in yyyy/mm/dd format. For example, January 23, 2018 should be written as 2018/01/23.

After finishing the document, she noticed that she had mistakenly wrote 2017 at the beginning of the date column. Write a program that, when the string that Takaki wrote in the date column, S, is given as input, modifies the first four characters in S to 2018 and prints it.

Constraints

S is a string of length 10.

The first eight characters in S are 2017/01/.

The last two characters in S are digits and represent an integer between 1 and 31 (inclusive).

Input

Input is given from Standard Input in the following format:

S

Output

Replace the first four characters in S with 2018 and print it.

Sample Input 1

2017/01/07

Sample Output 1

2018/01/07

Sample Input 2

2017/01/31

Sample Output 2

2018/01/31

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main(void) {

	int n, y, i, j, a=-1, b=-1, c=-1;

	scanf("%d%d", &n, &y);
	

	for (i = 0; i <= n; i++) {
		for (j = 0; i+j <= n; j++) {
			
			int z = n - i - j;
			if ((i * 10000 + j * 5000 + z * 1000) == y) {
				a = i;
				b = j;
				c = z;
				break;
			}
			if (z < 0) {
				break;
			}

		}
	}

	printf("%d, %d, %d", a, b, c);

	return 0;
}