Jam's problem again cdq分治

　　题意:  问每个点的等级

CDQ 注意处理一下完全相等的点即可

#include<bits/stdc++.h>
using namespace std;
//input by bxd
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define repp(i,a,b) for(int i=(a);i>=(b);--i)
#define RI(n) scanf("%d",&(n))
#define RII(n,m) scanf("%d%d",&n,&m)
#define RIII(n,m,k) scanf("%d%d%d",&n,&m,&k)
#define RS(s) scanf("%s",s);
#define ll long long
#define see(x) (cerr<<(#x)<<'='<<(x)<<endl)
#define pb push_back
#define inf 0x3f3f3f3f
#define CLR(A,v)  memset(A,v,sizeof A)
#define lson l,m,pos<<1
#define rson m+1,r,pos<<1|1
typedef pair<int,int>pii;
//////////////////////////////////
const int N=1e6+10;
int M,t[N],n,cnt,num,ans[N],maxx;
int lowbit(int i){return i&(-i);}
void add(int x,int v){for(;x<=100000+5;x+=lowbit(x))t[x]+=v;}
int get(int x){int ans=0;for(;x;x-=lowbit(x)) ans+=t[x];return ans;}

struct node
{
    int x,y,z,w,ans,id;
}s[N];
bool cmp(node a,node b)
{
    return a.x==b.x?a.y==b.y?a.z<b.z:a.y<b.y:a.x<b.x;
}
bool cmpy(node a,node b)
{
    return a.y<b.y||a.y==b.y&&a.z<b.z;
}
void cbq(int l,int r)
{
    if(l==r)return ;
    int mid=(l+r)>>1;
    cbq(l,mid);cbq(mid+1,r);
    sort(s+l,s+mid+1,cmpy);sort(s+mid+1,s+r+1,cmpy);
    int j=l;
    rep(i,mid+1,r)
    {
        while(s[j].y<=s[i].y&&j<=mid)
        add(s[j].z,1),j++;
        ans[s[i].id]+=get(s[i].z);
    }
    rep(i,l,j-1)//这里j-1 不能改成mid
    add(s[i].z,-1);
}

void sol()
{
    RI(n);//CLR(t,0);

    rep(i,1,n){RIII(s[i].x,s[i].y,s[i].z);s[i].id=i;ans[i]=0;  }
    sort(s+1,s+1+n,cmp);

    cbq(1,n);

    repp(i,n-1,1)
    if(s[i].x==s[i+1].x&&s[i].y==s[i+1].y&&s[i].z==s[i+1].z)
    ans[s[i].id]=ans[s[i+1].id];

    rep(i,1,n)
    printf("%d
",ans[i]);
}

int main()
{
    int cas;RI(cas);
    while(cas--)sol();
    return 0;
}