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 9.2.1) (judge verdict: Wrong Answer)

#include<stdio.h>

int main(){
	int N,Y,frag = 0,tmp,frag10000,frag5000,frag1000,a,b,c,A,B,C,x,y = -1;
	scanf("%d %d",&N,&Y);
	frag10000 = Y / 10000;
	frag5000 = Y / 5000;
	frag1000 = Y / 1000;
	for(a = 0; a <= frag10000; a++){
		for(b = 0; b <= frag5000; b++){
			c = N - a - b;
				x = (a * 10000) + (b * 5000) + (c * 1000);
				if(x == Y){
					frag++;
					A = a;
					B = b;
					C = c;
					break;
				}
			/*for(c = 0; c < frag1000; c++){
				tmp = a + b + c;
				x = (a * 10000) + (b * 5000) + (c * 1000);
				if((tmp == N) && (x == Y)){
					frag++;
					A = a;
					B = b;
					C = c;
					break;
				}
			}*/
		}
	}
	if(frag == 0){
		printf("-1 -1 -1");
	} else {
		printf("%d %d %d",A,B,C);
	}
	return 0;
}