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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <iostream>

int main(){

    int n = 0,y = 0;
    int k = 0;

    std::cin >> n >> y ;
    k = y / 10000;

    for (int a = k; a >= 0; a-- ){

        for(int b = n-k; b >= 0; b--) {
            int z = 0;
            z = y - (10000 * a + 5000 * b);

            if( z < 0 ){
                continue;
            }
            if( z%1000 == 0){
                if( a + b + z/1000 > n ){
                  continue;
                }
                std::cout << a << " " << b << " " << z/1000 << std::endl;
                return 0;
            }

        }
    }
    std::cout << "-1 -1 -1";

}