#include using namespace std; #define F first #define S second #define R cin>> #define Z class #define ll long long #define ln cout<<'\n' #define in(a) insert(a) #define pb(a) push_back(a) #define pd(a) printf("%.10f\n",a) #define mem(a) memset(a,0,sizeof(a)) #define all(c) (c).begin(),(c).end() #define iter(c) __typeof((c).begin()) #define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--) #define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++) #define rep(i,n) REP(i,0,n) #define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++) templatevoid pr(A a){cout<void pr(A a,B b){cout<void pr(A a,B b,C c){cout<void pr(A a,B b,C c,D d){cout<void PR(A a,ll n){rep(i,n){if(i)cout<<' ';cout<=0&&x=0&&y P; void Main() { ll n,m; cin >> n >> m; ll z=n*(n+1)/2; if(z%m) { pr("No"); return; } ll d=z/m; { vector ans[m]; ll sum[m]; mem(sum); rep(i,n) { ll k=i%m; if(i/m%2) { ans[m-1-k].pb(i+1); sum[m-1-k]+=i+1; } else { ans[k].pb(i+1); sum[k]+=i+1; } } rep(i,m) { if(sum[i]!=d) goto next; } pr("Yes"); rep(i,m) PR(ans[i],ans[i].size()); return; next:; } for(ll c=1; c*c<=m; c++) { if(m%c) continue; vector ans[m]; ll sum[m]; mem(sum); rep(i,n) { ll k=(i+i/m*c)%m; ll t=(k+i/m)%c; k=t+k/c*c; ans[k].pb(i+1); sum[k]+=i+1; } rep(i,m) { if(sum[i]!=d) goto next2; } pr("Yes"); rep(i,m) PR(ans[i],ans[i].size()); return; next2:; } pr("No"); } int main(){ios::sync_with_stdio(0);cin.tie(0);Main();return 0;}