Submission #969727

#	Time	Username	Problem	Language	Result	Execution time	Memory
969727		Warinchai	Holiday (IOI14_holiday)	C++14	7 / 100	5051 ms	7772 KiB

holiday

#include"holiday.h"
#include<bits/stdc++.h>
using namespace std;
long long rvid[100005];
struct segtree{
    long long info[400005];
    long long freq[400005];
    void upd(int st,int en,int i,int pos,int val){
        if(st>pos||en<pos)return;
        //cerr<<"range:"<<st<<" "<<en<<"\n";
        if(st==en)return info[i]+=val,freq[i]++,void();
        int m=(st+en)/2;
        upd(st,m,i*2,pos,val);
        upd(m+1,en,i*2+1,pos,val);
        info[i]=info[i*2]+info[i*2+1];
        freq[i]=freq[i*2]+freq[i*2+1];
    }
    void un_upd(int st,int en,int i,int pos,int val){
        if(st>pos||en<pos)return;
        if(st==en)return info[i]-=val,freq[i]--,void();
        int m=(st+en)/2;
        un_upd(st,m,i*2,pos,val);
        un_upd(m+1,en,i*2+1,pos,val);
        info[i]=info[i*2]+info[i*2+1];
        freq[i]=freq[i*2]+freq[i*2+1];
    }
    long long fans(int st,int en,int i,int pos){
        //cerr<<"Range:"<<st<<" "<<en<<"\n";
        if(st==en)return freq[i]*(rvid[st]);
        if(st==en)return freq[i]*(rvid[st]);
        int m=(st+en)/2;
        if(pos<=freq[i*2+1])return fans(m+1,en,i*2+1,pos);
        else return fans(st,m,i*2,pos-freq[i*2+1])+info[i*2+1];
    }
}tr;
vector<long long>v;
int id[100005];
map<int,int>mp;
long long int findMaxAttraction(int n, int start, int d, int attraction[]) {
    for(int i=0;i<n;i++)if(!mp[attraction[i]])v.push_back(attraction[i]),mp[attraction[i]]++;
    sort(v.begin(),v.end());
    for(int i=0;i<v.size();i++)rvid[i+1]=v[i];
    for(int i=0;i<n;i++)id[i]=lower_bound(v.begin(),v.end(),attraction[i])-v.begin()+1;
    long long ans=0;
    vector<int>tinf;
    for(int i=0;i<n;i++){
        //tinf.clear();
        for(int j=i;j<n;j++){
            //tinf.push_back(attraction[j]);
            //sort(tinf.begin(),tinf.end(),greater<int>());
            //int tsum=0;
            //int x=d-min(abs(i-start),abs(j-start))*2-max(abs(i-start),abs(j-start));
            //int y=tinf.size();
            //for(int k=0;k<min(x,y);k++)tsum+=tinf[k];
            //cerr<<i<<" "<<j<<"\n";
            tr.upd(1,n,1,id[j],attraction[j]);
            //cerr<<tr.info[1]<<" "<<tr.freq[1]<<"\n";
            //int temp=tr.fans(1,n,1,d-min(abs(i-start),abs(j-start))*2-max(abs(i-start),abs(j-start)));
            //assert(tsum==temp);
            if(start>=i&&start<=j&&min(abs(i-start),abs(j-start))*2+max(abs(i-start),abs(j-start))<=d)ans=max(ans,tr.fans(1,n,1,d-min(abs(i-start),abs(j-start))*2-max(abs(i-start),abs(j-start))))/*,cerr<<tr.fans(1,n,1,d-min(abs(i-start),abs(j-start))*2-max(abs(i-start),abs(j-start)))<<"\n"*/;
            //cerr<<"max:"<<ans<<"\n";
        }
        //cerr<<tr.info[1]<<" "<<tr.freq[1]<<"\n";
        for(int j=i;j<n;j++){
            tr.un_upd(1,n,1,id[j],attraction[j]);
        }
    }
    return ans;
}

Compilation message (stderr)

holiday.cpp: In function 'long long int findMaxAttraction(int, int, int, int*)':
holiday.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i=0;i<v.size();i++)rvid[i+1]=v[i];
      |                 ~^~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 0 / 23
• Subtask 3: 0 / 17
• Subtask 4: 0 / 53