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 Java (OpenJDK 11.0.6) (judge verdict: Runtime Error)

import java.util.*;

public class Main{

public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();  
      
      List<Integer> split = new ArrayList<>();
        for (int i = 0; i < n; i++) {
	        int buf = sc.nextInt();
	        split.add(buf);
        }
        
        int tmp = 0;
        int tmp2 = 0;
        int size = split.size();
 
        for(int i = 0; i < size ; i++ ){
            tmp = split.get(i);
            
            for(int j = 0; j < size ; j++){
                tmp2 = split.get(j);
                
                if(tmp2 == tmp && j!= i){
                  split.remove(j);
                  size -= 1;
                  j--;
                }
            }
        }
    if(size == 1){size = 0;}
    System.out.println(size);
  }
}