Problem:
Score : 100 points

Problem Statement

The door of Snuke's laboratory is locked with a security code.

The security code is a 4-digit number. We say the security code is hard to enter when it contains two consecutive digits that are the same.

You are given the current security code S. If S is hard to enter, print Bad; otherwise, print Good.

Constraints

S is a 4-character string consisting of digits.

Input

Input is given from Standard Input in the following format:

S

Output

If S is hard to enter, print Bad; otherwise, print Good.

Sample Input 1

3776

Sample Output 1

Bad

The second and third digits are the same, so 3776 is hard to enter.

Sample Input 2

8080

Sample Output 2

Good

There are no two consecutive digits that are the same, so 8080 is not hard to enter.

Sample Input 3

1333

Sample Output 3

Bad

Sample Input 4

0024

Sample Output 4

Bad

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define rep(a,n) for(int i=a;i<n;i++)
#define rep1(a,n) for(int i=a;i<=n;i++)
int main()
{
    int n,r,p=-1,flag=1;
    cin>>n;

    while(n>0)
    {
        r=n%10;
        n/=10;

       if(p==r)
       {  flag=0;
           break;
       }
         p=r;
    }
    if(flag==0)
      cout<<"Bad\n";
    else
        cout<<"Good\n";
    return 0;
}