Dice Combinations

input/code.cpp: In function 'int comb_rec_prog(int)':
input/code.cpp:14:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for(int i=0; i<sol.size(); i++){
      |                  ~^~~~~~~~~~~
input/code.cpp:17:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |             for(int d=0; d<dice.size(); d++){
      |                          ~^~~~~~~~~~~~

#include <iostream>
#include <vector>

using namespace std;

long int m=1000000007;

int comb_rec_prog(int n){
    vector<int> dice = {1,2,3,4,5,6};
    vector<long int> sol(n+1,-1);

    sol[0] = 1;

    for(int i=0; i<sol.size(); i++){
        if(sol[i]==-1){
            sol[i]=0;
            for(int d=0; d<dice.size(); d++){
                if((i-d) >= 0){
                    
                    sol[i] = (sol[i]+sol[i-d]) % m;
                }
            }
        }
    }
    return sol[n];

}

int main(){
    int n;
    cin >> n;

    cout << comb_rec_prog(n) <<endl;


}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: WRONG ANSWER

Test 14

Verdict: WRONG ANSWER

Test 15

Verdict: WRONG ANSWER

Test 16

Verdict: WRONG ANSWER

Test 17

Verdict: WRONG ANSWER

Test 18

Verdict: WRONG ANSWER

Test 19

Verdict: WRONG ANSWER

Test 20

Verdict: WRONG ANSWER