80分，WA了，求调qwq,暴力解的

// P1157 组合的输出
#include <bits/stdc++.h>
#define MAXN 22
#define for(i, a, b) for (int i = a; i <= b; i++)
using namespace std;

int n, r;
int main() {
    scanf("%d%d", &n, &r);
    switch (r) {
        case 1: {
            for(a, 1, n) printf("%3d\n", a);
            break;
        } case 2: {
            for(a, 1, n)
                for(b, a+1, n)
                    printf("%3d%3d\n", a, b);
            break;
        } case 3: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        printf("%3d%3d%3d\n", a, b, c);
            break;
        } case 4: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            printf("%3d%3d%3d%3d\n", a, b, c, d);
            break;
        } case 5: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                printf("%3d%3d%3d%3d%3d\n", a, b, c, d, e);
            break;
        } case 6: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    printf("%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f);
            break;
        } case 7: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        printf("%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g);
            break;
        } case 8: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            printf("%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h);
            break;
        } case 9: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i);
            break;
        } case 10: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j);
            break;
        } case 11: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k);
            break;
        } case 12: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l);
            break;
        } case 13: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m);
            break;
        } case 14: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, o);
            break;
        } case 15: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, o, p);
            break;
        } case 16: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        for(q, p+1, n)
                                                                            printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, o, p, q);
            break;
        } case 17: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        for(q, p+1, n)
                                                                            for(r, q+1, n)
                                                                                printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r);
            break;
        } case 18: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        for(q, p+1, n)
                                                                            for(r, q+1, n)
                                                                                for(s, r+1, n)
                                                                                    printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s);
            break;
        } case 19: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        for(q, p+1, n)
                                                                            for(r, q+1, n)
                                                                                for(s, r+1, n)
                                                                                    for(t, s+1, n)
                                                                                        printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t);
            break;
        } case 20: {
            for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        for(q, p+1, n)
                                                                            for(r, q+1, n)
                                                                                for(s, r+1, n)
                                                                                    for(t, s+1, n)
                                                                                        for(u, t+1, n)
                                                                                            printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u);
            break;
        } case 21: {
                        for(a, 1, n)
                for(b, a+1, n)
                    for(c, b+1, n)
                        for(d, c+1, n)
                            for(e, d+1, n)
                                for(f, e+1, n)
                                    for(g, f+1, n)
                                        for(h, g+1, n)
                                            for(i, h+1, n)
                                                for(j, i+1, n)
                                                    for(k, j+1, n)
                                                        for(l, k+1, n)
                                                            for(m, l+1, n)
                                                                for(o, m+1, n)
                                                                    for(p, o+1, n)
                                                                        for(q, p+1, n)
                                                                            for(r, q+1, n)
                                                                                for(s, r+1, n)
                                                                                    for(t, s+1, n)
                                                                                        for(u, t+1, n)
                                                                                            for(v, u+1, n)
                                                                                                printf("%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d%3d\n", a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v);
            break;
        } default: {
            printf("damn!!!");
            break;
        }
    }

    return 0;
}