#include using namespace std; #define int long long #define REP(i,n) for(int i = 0;i < (int)(n);i++) #define RREP(i,n) for(int i = (int)n-1;i >= 0;i--) #define FOR(i,s,n) for(int i = s;i < (int)n;i++) #define RFOR(i,s,n) for(int i = (int)n-1;i >= s;i--) #define ALL(a) a.begin(),a.end() #define IN(a, x, b) (a<=x && xinline bool CHMAX(T&a,T b){if(ainline bool CHMIN(T&a,T b){if(a>b){a = b;return true;}return false;} constexpr long long INF = 1e18; signed main(){ int N,K; cin>>N>>K; int sum = N * (N + 1) / 2; if(sum % K){ cout << "No" << endl; return 0; } vector>ans(K); if(K % 2){ if(N == K){ cout << "No" << endl; return 0; } REP(i,2*K){ if(i % 2)ans[i % K].push_back(K + i / 2); else ans[i % K].push_back(i / 2); } REP(i,K){ ans[i].push_back(3 * K - i - 1); } int turn = N / K - 3; REP(i,turn / 2){ REP(j,K){ ans[j].push_back(i * 2 * K + 3 * K + j); ans[j].push_back(i * 2 * K + 3 * K + 2 * K - j - 1); } } }else{ int turn = N / K; REP(i,turn / 2){ REP(j,K){ ans[j].push_back(i * 2 * K + j); ans[j].push_back(i * 2 * K + 2 * K - j - 1); } } } cout << "Yes" << endl; REP(i,K){ REP(j,ans[i].size()){ if(j)cout << " "; cout << ans[i][j] + 1; } cout << endl; } }