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 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>

int main(){
    int num = 0;
    int sum = 0;
    
    int sub_man = 0;
    int sub_gosen = 0; 

    scanf("%d",&num);
    scanf("%d",&sum);
    
    // printf("man:%d gosen:%d\n",sub_man,sub_gosen);

    for(int num_man=num; num_man>0; num_man--){

        for(int num_gosen=0; num_gosen<=num; num_gosen++){

            if(sum > num_man*10000+num*5000 || num_man*10000>sum){
                // printf("break\n");
                break;
            }

            for(int num_sen=0; num_sen<=num; num_sen++){

                if(sum > num_man*10000+num_gosen*5000+num*1000){
                    // printf("break\n");
                    break;
                }

                // printf("sum:%d 1万:%d 5千:%d 1千:%d\n",10000*num_man+5000*num_gosen+1000*num_sen,num_man,num_gosen,num_sen);

                if(10000*num_man+5000*num_gosen+1000*num_sen == sum 
                    && num_man+num_gosen+num_sen == num){
                    printf("%d %d %d\n",num_man,num_gosen,num_sen);
                    return 0;
                }
            }
        }
     }

    printf("-1 -1 -1\n");

    return 0;
}