Dice Combinations

#include <bits/stdc++.h>
using namespace std;

#define int long long
const int INF = 1e9;
const int mod = 1e9 + 7;
const int N = 1e6 + 5;
int dp[N];

signed main()
{
    int n;
    cin >> n;
    dp[0] = 0;
    for(int i = 1; i <= 6; i++)
        dp[i] = 1;

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= 6; j++){
            if(i >= j)
                dp[i] += dp[i - j];
            dp[i] %= mod;
        }
    }
    cout << dp[n] << endl;
}