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 (Clang 10.0.0) (judge verdict: Wrong Answer)

#include<stdio.h>
int main(){
  int a=0,b=0,c=0,n=0,x=0,y=0,z=0,D=0,p=0;
  scanf("%d %d",&n,&p);
  for(b=0;b<=n;b++){
    for(c=0;c<=n;c++){
      a=n-(b+c);
      if(a>=0&&b>=0&&c>=0&&a+b+c==n&&10000*a+5000*b+1000*c){
        x=a;
        y=b;
        z=c;
        D=1;
        break;
      }
    }
  }
  
  if(D==1){
    printf("%d %d %d",x,y,z);
  }
  else{
    printf("-1 -1 -1");
  }
  return 0;
}