#include <bits/stdc++.h>

using namespace std;
int b[] = {0, 13, 32, 9, 40, 19};
int main() {
    int n = 5;
    sort(b + 1, b + n + 1);
    int tot = unique(b + 1, b + n + 1) - b - 1;
    cout << tot << endl;

    for (int i = 1; i <= tot; i++) cout << b[i] << " ";
    return 0;
}
/*
输出:
5
9 13 19 32 40
*/