#include #define for_i(i, range, inner) \ { \ int i; \ for (i = 0; i < range; i++) \ inner; \ } int main() { int n, m; scanf("%d %d", &n, &m); for_i(i, n, { for_i(j, i + 1, { printf("%d", m); }); printf("\n"); }) return 0; }