BZOJ 1568 李超线段树

//By SiriusRen
#include <cmath>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
#define N 100050
int n,t;char op[10];
struct Tree{double s,p;}tr[N*8];
void insert(int l,int r,int pos,double s,double p){
int mid=(l+r)>>1,lson=pos<<1,rson=pos<<1|1;
if(tr[pos].s==0&&tr[pos].p==0){tr[pos].s=s,tr[pos].p=p;return;}
double val1=tr[pos].s+(mid-1.0)*tr[pos].p;
double val2=s+(mid-1.0)*p;
if(l==r){if(val2>val1)tr[pos].s=s,tr[pos].p=p;}
else if(tr[pos].p==p)tr[pos].s=max(tr[pos].s,s);
else if(tr[pos].p>p){
if(val1>=val2)insert(l,mid,lson,s,p);
else insert(mid+1,r,rson,tr[pos].s,tr[pos].p),tr[pos].s=s,tr[pos].p=p;
}
else{
if(val1>=val2)insert(mid+1,r,rson,s,p);
else insert(l,mid,lson,tr[pos].s,tr[pos].p),tr[pos].s=s,tr[pos].p=p;
}
}
double query(int l,int r,int pos,int x){
int mid=(l+r)>>1,lson=pos<<1,rson=pos<<1|1;
double ans=max(0.0,tr[pos].s+(x-1.0)*tr[pos].p);
if(l==r)return ans;
if(x<=mid)ans=max(ans,query(l,mid,lson,x));
else ans=max(ans,query(mid+1,r,rson,x));
return ans;
}
int main(){
scanf("%d",&n);
for(int i=1;i<=n;i++){
scanf("%s",op);
if(op[0]=='Q'){
scanf("%d",&t);
printf("%d\n",((int)query(1,50000,1,t))/100);
}
else if(op[0]=='P'){
double s,p;
scanf("%lf%lf",&s,&p);
insert(1,50000,1,s,p);
}
}
}