/* -*- coding: utf-8 -*- * * 942.cc: No.942 プレゼント配り - yukicoder */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; /* constant */ const int MAX_N = 200000; /* typedef */ typedef vector vi; /* global variables */ vi ds[MAX_N]; /* subroutines */ /* main */ int main() { int n, k; scanf("%d%d", &n, &k); int m = n / k; if (m & 1) { puts("No"); return 0; } for (int i = 0, d = 1; i < m; i++) { if (! (i & 1)) for (int j = 0; j < k; j++) ds[j].push_back(d++); else for (int j = k - 1; j >= 0; j--) ds[j].push_back(d++); } puts("yes"); for (int i = 0; i < m; i++) { for (int j = 0; j < k; j++) { if (j) putchar(' '); printf("%d", ds[i][j]); } putchar('\n'); } return 0; }