Dice Combinations

#include <vector>
#include <iostream>
 
using namespace std;
 
const long mod = 1000000007;
 
int main() {
    int n;
    cin >> n;
    vector<int> v(n + 7);
    for (int i = 0; i < 6; ++i) {
        v[i] = 1 << i;
    }
    for (int i = 6; i < n; ++i) {
        long s = 0;
        for (int j = 1; j <= 6; ++j) s += v[i - j];
        v[i] = s % mod;
    }
    int i = n > 0 ? n : 1;
    cout << v[i - 1] << endl;
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED