BZOJ3941 : [Usaco2015 Feb]Fencing the Herd

若所有点同侧则表明将各个点带入直线解析式ax+by-c后得到的值均同号
等价于最大值和最小值同号
考虑CDQ分治，每一步分治的过程中求出上下凸壳，然后三分答案即可
时间复杂度$O(n\log^2n)$

#include<cstdio>
#include<algorithm>
typedef long long ll;
const int N=200010;
const ll inf=1LL<<60;
struct P{int x,y;P(){}P(int _x,int _y){x=_x,y=_y;}}b[N],q1[N],q2[N],now;
struct Q{int a,b,q;ll c;Q(){}Q(int _a,int _b,ll _c,int _q){a=_a,b=_b,c=_c,q=_q;}}a[N];
int n,m,i,op,A,B,cnt,t1,t2,m1,m2,len;ll C,s1,s2,ans1[N],ans2[N];
inline bool cmp1(P a,P b){return a.x==b.x?a.y>b.y:a.x<b.x;}
inline bool cmp2(P a,P b){return a.x==b.x?a.y<b.y:a.x<b.x;}
inline ll mul(P b){return(ll)now.x*b.x+(ll)now.y*b.y;}
inline void Max(ll&a,ll b){if(a<b)a=b;}
inline void Min(ll&a,ll b){if(a>b)a=b;}
inline void read(int&a){
  char c;bool f=0;a=0;
  while(!((((c=getchar())>=‘0‘)&&(c<=‘9‘))||(c==‘-‘)));
  if(c!=‘-‘)a=c-‘0‘;else f=1;
  while(((c=getchar())>=‘0‘)&&(c<=‘9‘))(a*=10)+=c-‘0‘;
  if(f)a=-a;
}
inline void read(ll&a){
  char c;bool f=0;a=0;
  while(!((((c=getchar())>=‘0‘)&&(c<=‘9‘))||(c==‘-‘)));
  if(c!=‘-‘)a=c-‘0‘;else f=1;
  while(((c=getchar())>=‘0‘)&&(c<=‘9‘))(a*=10)+=c-‘0‘;
  if(f)a=-a;
}
inline void askmax1(ll&t){
  for(int l=0,r=t1;l<=r&&t<C;){
    len=(r-l)/3;
    if((s1=mul(q1[m1=l+len]))>(s2=mul(q1[m2=r-len])))Max(t,s1),r=m2-1;else Max(t,s2),l=m1+1;
  }
}
inline void askmax2(ll&t){
  for(int l=0,r=t2;l<=r&&t<C;){
    len=(r-l)/3;
    if((s1=mul(q2[m1=l+len]))>(s2=mul(q2[m2=r-len])))Max(t,s1),r=m2-1;else Max(t,s2),l=m1+1;
  }
}
inline void askmin1(ll&t){
  for(int l=0,r=t1;l<=r&&t>C;){
    len=(r-l)/3;
    if((s1=mul(q1[m1=l+len]))<(s2=mul(q1[m2=r-len])))Min(t,s1),r=m2-1;else Min(t,s2),l=m1+1;
  }
}
inline void askmin2(ll&t){
  for(int l=0,r=t2;l<=r&&t>C;){
    len=(r-l)/3;
    if((s1=mul(q2[m1=l+len]))<(s2=mul(q2[m2=r-len])))Min(t,s1),r=m2-1;else Min(t,s2),l=m1+1;
  }
}
void solve(int l,int r){
  if(l==r)return;
  int mid=(l+r)>>1;
  solve(l,mid),solve(mid+1,r);
  for(cnt=0,i=l;i<=mid;i++)if(!a[i].q)b[cnt++]=P(a[i].a,a[i].b);
  if(!cnt)return;
  for(std::sort(b,b+cnt,cmp1),q1[t1=0]=b[0],i=1;i<cnt;i++)if(b[i].x!=b[i-1].x){
    while(t1&&(ll)(q1[t1].y-q1[t1-1].y)*(b[i].x-q1[t1].x)<=(ll)(b[i].y-q1[t1].y)*(q1[t1].x-q1[t1-1].x))t1--;
    q1[++t1]=b[i];
  }
  for(std::sort(b,b+cnt,cmp2),q2[t2=0]=b[0],i=1;i<cnt;i++)if(b[i].x!=b[i-1].x){
    while(t2&&(ll)(q2[t2].y-q2[t2-1].y)*(b[i].x-q2[t2].x)>=(ll)(b[i].y-q2[t2].y)*(q2[t2].x-q2[t2-1].x))t2--;
    q2[++t2]=b[i];
  }
  for(i=r;i>mid;i--)if(a[i].q){
    now=P(a[i].a,a[i].b),C=a[i].c;
    if(a[i].b>0)askmin2(ans1[i]),askmax1(ans2[i]);else askmin1(ans1[i]),askmax2(ans2[i]);
  }
}
int main(){
  read(n),read(m);
  for(i=1;i<=n;i++)read(A),read(B),a[i]=Q(A,B,0,0);
  for(i=1;i<=m;i++){
    read(op),read(A),read(B);
    if(op==1)a[n+i]=Q(A,B,0,0);else read(C),a[n+i]=Q(A,B,C,1);
    ans1[n+i]=inf,ans2[n+i]=-inf;
  }
  solve(1,n+=m);
  for(i=1;i<=n;i++)if(a[i].q)puts(ans2[i]<a[i].c||ans1[i]>a[i].c?"YES":"NO");
  return 0;
}