#include <fstream>

using namespace std;

ifstream fin("reguli.in");
ofstream fout("reguli.out");

int N;
long v[500005];
int p[500005];

int main()
{
    fin >> N;
    for(int i = 1; i <= N; ++i)
    {
        fin >> v[i];
        v[i - 1] = v[i] - v[i - 1];
    }
    --N;

    for(int i = 2, q = 0; i <= N; ++i)
    {
        while(q != 0 && v[q + i] != v[i])
            q = p[q];
        if(p[q + i] == p[i])
            q++;
        p[i] = q;
    }

    fout << N - p[N] << '\n';
    for(int i  = 1; i <= N - p[N]; ++i)
        fout << p[i] << "\n";

    return 0;
}