#include <cstdio>
#include <cstdlib>

long long cit() {
    long long ans = 0;
    char c = getchar();
    bool neg = false;
    while (c < '0' || c > '9') {
        if (c == '-') {
            c = getchar();
            neg = true;
            break;
        }
        c = getchar();
    }
    while (c >= '0' && c <= '9') {
        ans = (ans << 3) + (ans << 1) + (c - '0');
        c = getchar();
    }
    return (neg) ? -ans : ans;
}

void afis(long long n, char d) {
    int l = 0;
    char c[20];
    if (n == 0) {
        putchar('0');
    }
    if (n < 0) {
        putchar('-');
        n = -n;
    }
    while (n > 0) {
        c[l++] = n % 10 + '0';
        n /= 10;
    }
    for (int i = l - 1; i >= 0; i--) {
        putchar(c[i]);
    }
    putchar(d);
}

int main() {
    freopen("lacate.in", "r", stdin);
    freopen("lacate.out", "w", stdout);

    int n = cit();
    int m[260][260];
    afis(n * (n - 1) / 2, ' ');
    afis(n - 1, '\n');
    int nr = 1;
    for (int i = 1; i <= n; i++) {
        for (int j = i + 1; j <= n; j++) {
            m[i][j] = m[j][i] = nr;
            nr++;
        }
        for (int j = 1; j <= n; j++) {
            if (i == j)
                continue;
            afis(m[i][j], ' ');
        }
        printf("\n");
    }

    return 0;
}