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 3.8.0) (judge verdict: Wrong Answer)

#include<stdio.h>

int main(void){
    int N;
    int i,j,k;
    int s;
    
    scanf("%d",&N);
    
    int m[N];
    
    //  値の格納
    for(i=0;i<N;i++){
        scanf("%d",&m[i]);
    }
    
    //  挿入ソート
    for(i=0;i<N;i++){
        s=m[i];
        for(j=0;j<i;j++){
            if(m[i]<m[j]){
                for(k=i;k>j;k--){
                    m[k]=m[k-1];
                }
                m[j]=s;
            }
        }
    }
    
    for(i=0;i<N-1;i++){
        if(m[i]==m[i+1]){
            N--;
        }
    }
    
    printf("%d",N);
    
    return 0;
}