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=0,Y=0,i,a=0,b=0,c=0;
  scanf("%d %d",&N,&Y);
  for(i=20;i>0;i=i-1){
    if(Y>10000){
      i=i-Y/10000;
      a=Y/10000;
      Y=Y%10000;
    }
    if(Y>5000){
      i=i-Y/5000;
      b=5000;
      Y=Y%5000;
    }
      if(Y>1000){
        i=i-Y/1000;
        c=Y/1000;
        Y=Y%1000;
      }
  }
 if(Y==0){
 printf("%d %d %d",a,b,c);
 }
  else{
    printf("-1 -1 -1");
  }
  return 0;
}