今天突然想写个树套树爽一爽(1810ms)
写的是树状数组套线段树(动态开节点)
#include<cstdio> #include<cctype> #include<cstring> #include<algorithm> using namespace std; inline int read() { int x=0,f=1;char c=getchar(); for(;!isdigit(c);c=getchar()) if(c=='-') f=-1; for(;isdigit(c);c=getchar()) x=x*10+c-'0'; return x*f; } const int maxn=200010; const int maxnode=20000010; int sum[maxnode],ls[maxnode],rs[maxnode],ToT; void update(int& y,int l,int r,int& pos,int& v) { if(!y) y=++ToT; sum[y]+=v;if(l==r) return; int mid=l+r>>1; if(pos<=mid) update(ls[y],l,mid,pos,v); else update(rs[y],mid+1,r,pos,v); } int ans; void query(int& y,int l,int r,int& ql,int& qr) { if(ql<=l&&r<=qr) {ans+=sum[y];return;} if(!y) return; int mid=l+r>>1; if(ql<=mid) query(ls[y],l,mid,ql,qr); if(qr>mid) query(rs[y],mid+1,r,ql,qr); } int n,root[maxn],lastans; void add(int x,int y,int v) { for(;x<=400000;x+=x&-x) update(root[x],1,400000,y,v); } int query(int x,int ql,int qr) { ans=0; for(;x;x-=x&-x) query(root[x],1,400000,ql,qr); return ans; } int tp[200010],x1[200010],x2[200010],y1[200010],y2[200010],v[200010]; int tmp[400010],tot; int main() { read();n=read();int m; for(int i=1;;i++) { tp[i]=read(); if(tp[i]==3) {m=i;break;} else if(tp[i]==1) x1[i]=read(),y1[i]=read(),v[i]=read(); else x1[i]=read(),y1[i]=read(),x2[i]=read(),y2[i]=read(),tmp[++tot]=x2[i]; tmp[++tot]=x1[i]; } sort(tmp+1,tmp+tot+1); for(int i=1;i<=m;i++) x1[i]=lower_bound(tmp+1,tmp+tot+1,x1[i])-tmp,x2[i]=lower_bound(tmp+1,tmp+tot+1,x2[i])-tmp; tot=0;for(int i=1;i<=m;i++) tmp[++tot]=y1[i],tmp[++tot]=y2[i];sort(tmp+1,tmp+tot+1); for(int i=1;i<=m;i++) y1[i]=lower_bound(tmp+1,tmp+tot+1,y1[i])-tmp,y2[i]=lower_bound(tmp+1,tmp+tot+1,y2[i])-tmp; for(int i=1;i<=m;i++) { if(tp[i]==3) break; else if(tp[i]==1) add(x1[i],y1[i],v[i]); else printf("%d ",query(x2[i],y1[i],y2[i])-query(x1[i]-1,y1[i],y2[i])); } return 0; }
竟然还要离散TAT(maxnode开到2*10^8会RE,开到2.5*10^8会MLE)
这是之前写的CDQ分治(328ms)
代码难看勿喷
#include<cstdio> #include<cstring> #include<cctype> #include<algorithm> using namespace std; char ch;int sig; inline void read(int& x) { ch=getchar(); sig=1; x=0; while(!isdigit(ch)&&ch!='-') ch=getchar(); if(ch=='-') sig=-1,ch=getchar(); while(isdigit(ch)) x=x*10+ch-'0',ch=getchar(); x*=sig; } const int maxn=250010; struct Query { int t,x,y,v,id; bool operator < (const Query& ths) const { return x<ths.x||(x==ths.x&&y<ths.y)||(x==ths.x&&y==ths.y&&t<ths.t); } }A[maxn],t1[maxn]; int ans[10010]; int w,s; int C[2000010]; void update(int x,int v) { for(;x<=w;x+=x&-x) C[x]+=v; } int query(int x) { int ret=0; for(;x;x-=x&-x) ret+=C[x]; return ret; } void solve(int L,int R) { if(L==R) return; int m1=0,m2=0,M=L+R>>1; solve(L,M); solve(M+1,R); for(int i=L;i<=M;i++) if(A[i].t==1) t1[m1++]=A[i]; if(!m1) return; m2=m1; for(int i=M+1;i<=R;i++) if(A[i].t==2) t1[m2++]=A[i]; if(m2==m1) return; sort(t1,t1+m2); for(int i=0;i<m2;i++) { if(t1[i].t==1) update(t1[i].y,t1[i].v); else ans[t1[i].id]+=t1[i].v*query(t1[i].y); } for(int i=0;i<m2;i++) if(t1[i].t==1) update(t1[i].y,-t1[i].v); } int main() { scanf("%d%d",&s,&w); int x1,y1,x2,y2,t,a,tot=0,n=0; while(1) { read(t); if(t==3) break; if(t==1) { read(x1); read(y1); read(a); A[++tot]=(Query){t,x1,y1,a,1}; } else { read(x1); read(y1); read(x2); read(y2); ans[++n]=(x2-x1+1)*(y2-y1+1)*s; A[++tot]=(Query){t,x1-1,y1-1,1,n}; A[++tot]=(Query){t,x2,y2,1,n}; A[++tot]=(Query){t,x1-1,y2,-1,n}; A[++tot]=(Query){t,x2,y1-1,-1,n}; } } solve(1,tot); for(int i=1;i<=n;i++) printf("%d ",ans[i]); return 0; }
YY了一个k-d树(625ms)
#include<cstdio> #include<cctype> #include<cstring> #include<algorithm> using namespace std; inline int read() { int x=0,f=1;char c=getchar(); for(;!isdigit(c);c=getchar()) if(c=='-') f=-1; for(;isdigit(c);c=getchar()) x=x*10+c-'0'; return x*f; } const int maxn=500010; int lc[maxn],rc[maxn],x[maxn],y[maxn],mxx[maxn],mxy[maxn],mnx[maxn],mny[maxn],sum[maxn]; void maintain(int r) { mxx[r]=max(x[r],max(mxx[lc[r]],mxx[rc[r]])); mnx[r]=min(x[r],min(mnx[lc[r]],mnx[rc[r]])); mxy[r]=max(y[r],max(mxy[lc[r]],mxy[rc[r]])); mny[r]=min(y[r],min(mny[lc[r]],mny[rc[r]])); } int x1,y1,x2,y2,v,ToT; void insert(int& r,int d) { if(!r) r=++ToT,x[r]=mxx[r]=mnx[r]=x1,y[r]=mny[r]=mxy[r]=y1; sum[r]+=v; if(x[r]==x1&&y[r]==y1) return; if(!d) { if(x1<=x[r]) insert(lc[r],d^1); else insert(rc[r],d^1); } else { if(y1<=y[r]) insert(lc[r],d^1); else insert(rc[r],d^1); } maintain(r); } int query(int r,int d) { if(!r) return 0; if(mnx[r]>=x1&&mxx[r]<=x2&&mny[r]>=y1&&mxy[r]<=y2) return sum[r]; int ret=0; if(x[r]<=x2&&x[r]>=x1&&y[r]<=y2&&y[r]>=y1) ret+=sum[r]-sum[lc[r]]-sum[rc[r]]; if(!d) { if(x1<=x[r]) ret+=query(lc[r],d^1); if(x2>x[r]) ret+=query(rc[r],d^1); } else { if(y1<=y[r]) ret+=query(lc[r],d^1); if(y2>y[r]) ret+=query(rc[r],d^1); } return ret; } int main() { read();int n=read(),root=0; mxx[0]=mxy[0]=-1e9;mnx[0]=mny[0]=1e9; for(;;) { int tp=read(); if(tp==3) break; else if(tp==1) { x1=read();y1=read();v=read(); insert(root,0); } else { x1=read();y1=read();x2=read();y2=read(); printf("%d ",query(root,0)); } } return 0; }
最后写了写树状数组套Treap(1919ms)
#include<cstdio> #include<cctype> #include<cstring> #include<ctime> #include<algorithm> using namespace std; inline int read() { int x=0,f=1;char c=getchar(); for(;!isdigit(c);c=getchar()) if(c=='-') f=-1; for(;isdigit(c);c=getchar()) x=x*10+c-'0'; return x*f; } const int maxn=2000010; struct Node { Node* ch[2]; int r,s,v,v2,sum; void maintain() {s=ch[0]->s+ch[1]->s+1;sum=v2+ch[0]->sum+ch[1]->sum;} }nodes[maxn],*null=&nodes[0]; int ToT; void rotate(Node* &o,int d) { Node* k=o->ch[d^1];o->ch[d^1]=k->ch[d];k->ch[d]=o; o->maintain();k->maintain();o=k; } void insert(Node* &o,int v,int v2) { if(o==null) { o=&nodes[++ToT]; o->r=rand();o->s=1;o->v=v;o->v2=o->sum=v2; o->ch[0]=o->ch[1]=null; } else { int d=v>o->v; insert(o->ch[d],v,v2); if(o->ch[d]->r>o->r) rotate(o,d^1); else o->maintain(); } } int query(Node* &o,int v) { if(o==null) return 0; if(v<=o->v) return query(o->ch[0],v); return o->ch[0]->sum+o->v2+query(o->ch[1],v); } Node* root[maxn];int n; void add(int x,int y,int v) { for(;x<=n;x+=x&-x) insert(root[x],y,v); } int query(int x,int y1,int y2) { int ret=0; for(;x;x-=x&-x) ret+=query(root[x],y2+1)-query(root[x],y1); return ret; } int main() { srand(time(0));null->s=null->sum=0; read();n=read(); for(int i=1;i<=n;i++) root[i]=null; for(;;) { int tp=read(); if(tp==3) break; if(tp==1) { int x=read(),y=read(),v=read(); add(x,y,v); } else { int x1=read(),y1=read(),x2=read(),y2=read(); printf("%d ",query(x2,y1,y2)-query(x1-1,y1,y2)); } } return 0; }