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)

#include<stdio.h>{
	int main(){
		int n,y,i,j,k;
		scanf("%d %d",&n,&y);
		
		for(i=0;i<=n&&i*10<=y/1000;i++){
			for(j=0;i+j<=n&&i*10+j*5<=y/1000;j++){
				for(k=0;i+j+k<=n&&i*10+j*5+k<=y/1000;k++){
					if(i*10+j*5+k==y/1000){
						printf("%d %d %d",k,j,i);
						return(0);
					}
				}
			}
		}
				
		printf("-1 -1 -1");
		
		return(0);
	}