https://www.luogu.org/problemnew/show/P3810
复习板子,重要的题就真的要写三遍???之前写过一篇博客了,不过之前写的那个板子的sort用的规则真是沙雕
#include<bits/stdc++.h> using namespace std; const int maxn=100010; int n,k,tot=0; struct flos{ int x,y,z; int ans,cnt; }f[maxn]; int num[maxn]={},t[maxn*2]={}; inline bool mcmp1(flos a,flos b){ if(a.x==b.x){ if(a.y==b.y)return a.z<b.z; return a.y<b.y; } return a.x<b.x; } inline bool mcmp2(flos a,flos b){ if(a.y==b.y){ if(a.z==b.z)return a.x<b.x; return a.z<b.z; } return a.y<b.y; } void addt(int x,int v){ while(x<=k){ t[x]+=v; x+=(x&-x); } } int gett(int x){ int tsn=0; while(x){ tsn+=t[x]; x-=(x&-x); }return tsn; } void mcdq(int l,int r){ if(l==r){ f[l].ans+=f[l].cnt-1; return; } int mid=(l+r)/2; mcdq(l,mid); mcdq(mid+1,r); sort(f+l,f+mid+1,mcmp2); sort(f+mid+1,f+r+1,mcmp2); int j=l; for(int i=mid+1;i<=r;++i){ while(f[j].y<=f[i].y&&j<=mid){addt(f[j].z,f[j].cnt);++j;} f[i].ans+=gett(f[i].z); } for(int i=l;i<j;++i)addt(f[i].z,-f[i].cnt); } int main(){ scanf("%d%d",&n,&k); for(int i=1; i<=n; ++i)scanf("%d%d%d",&f[i].x,&f[i].y,&f[i].z); sort(f+1,f+1+n,mcmp1); //for(int i=1;i<=n;++i)cout<<f[i].x<<f[i].y<<f[i].z<<endl; for(int i=1; i<=n; ++i){ if(i!=1 && f[i].x==f[i-1].x && f[i].y==f[i-1].y && f[i].z==f[i-1].z)++f[tot].cnt; else{ f[++tot]=f[i]; f[tot].cnt=1;} } mcdq(1,tot); for(int i=1;i<=tot;++i)num[f[i].ans]+=f[i].cnt; for(int i=0;i<n;++i)printf("%d ",num[i]); return 0; }