#include <cstdio>
using namespace std;

int GCD(int a, int b)
{
    return b == 0? a : GCD(b, a % b);
}

int main()
{
    int T;
    scanf("%d", &T);
    while (T--)
    {
        int n;
        scanf("%d", &n);
        int ans = 0;
        for (int i = 1; i <= n; i++)
        {
            if (GCD(i, n + 1) == 1) ans++;
        }
        printf("%d\n", ans);
    }
    return 0;
}