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,BOOL=0,i,j,k;
  scanf("%d %d",&N,&Y);
  for(i=0;i<=N;i++)
  {
    for(j=0;j<=N;j++)
    {
      k=N-(i+j);
      if(k>=0&&i+j+k==N&&10000*k+5000*j+1000*i==Y)
      {
        BOOL=1;
     	break;
      }
    }    
   }
  
  if(BOOL==1){printf("%d %d %d",k,j,i);}
  else printf("-1 -1 -1");
return 0;
}