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>
#include <vector>
#include <algorithm>
using namespace std;

typedef long long ll;
int n,h;
vector<int> th;
int maxa,maxai;
int a[100005];
int b[100005];
int ans;
int main() {

  cin >> n >> h;
  for(int i = 0; i < n; i++) {
    cin >> a[i] >> b[i];
    if(maxa < a[i]) {
      maxa = a[i];
      maxai = i;
    }
  }

  for(int i = 0; i < n; i++) {
    if(maxai != i && maxa < b[i]) th.push_back(b[i]);
  }

  sort(th.begin(),th.end(),greater<int> ());

  for(int i = 0; i <= th.size(); i++) {
    if(h <= b[maxai]) {
      cout << ans + 1 << endl;
      return 0;
    }
    if(i < th.size()) {
    h -= th[i];
    ans++;
    }
  }
  int tmp = h / maxa;

  while(h <= (tmp - 1) * maxa + b[maxai]) tmp--;


  cout << ans + tmp + 1 << endl;
  
  
}