#include <stdio.h>

int main() {
    int N;
    scanf("%d", &N);

    // Number of edges
    printf("%d\n", N - 1);

    // Build chain
    for (int i = 1; i < N; i++) {
        int w = 2 * i - 1;
        printf("%d %d %d\n", i, i + 1, w);
    }

    // Output Q(i,j)
    for (int i = 1; i <= N; i++) {
        for (int j = i + 1; j <= N; j++) {
            for (int k = i; k < j; k++) {
                printf("%d", k);
                if (k != j - 1) printf(" ");
            }
            printf("\n");
        }
    }

    return 0;
}