제출 #834788

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
834788		JakobZorz	사탕 분배 (IOI21_candies)	C++17	0 / 100	62 ms	11248 KiB

candies

#include"candies.h"
#include<iostream>
#include<vector>
#include<limits.h>
using namespace std;
typedef long long ll;

int n,days;
const int TREE_SIZE=1<<11;

vector<ll>mn;
vector<ll>mx;
void tree_init(){
    mn.resize(TREE_SIZE*2);
    mx.resize(TREE_SIZE*2);
}

void update_node(int node){
    if(node>=TREE_SIZE){
        mn[node]=mx[node];
        return;
    }
    
    mn[node]=min(mn[2*node],mn[2*node+1]);
    mx[node]=max(mx[2*node],mx[2*node+1]);
}

void tree_add(int node,int l,int r,int pos,int val){
    //cout<<l<<" "<<r<<endl;
    if(r<=pos)
        return;
    
    if(node>=TREE_SIZE){
        mx[node]+=val;
        update_node(node);
        return;
    }
    
    int m=(l+r)/2;
    tree_add(2*node,l,m,pos,val);
    tree_add(2*node+1,m,r,pos,val);
    update_node(node);
}

void tree_add(int pos,int val){
    tree_add(1,0,TREE_SIZE,pos,val);
}

pair<pair<ll,ll>,int>tree_get2(int node,int l,int r,ll p_max,ll p_min,int bound){
    //cout<<l<<" "<<r<<"\n";
    if(node>=TREE_SIZE)
        return {{max(p_max,mx[node]),min(p_min,mn[node])},l};
    
    int p_max2=max(p_max,mx[2*node+1]);
    int p_min2=min(p_min,mn[2*node+1]);
    int m=(l+r)/2;
    
    if(p_max2-p_min2<bound){
        return tree_get2(2*node,l,m,p_max2,p_min2,bound);
    }else{
        return tree_get2(2*node+1,m,r,p_max,p_min,bound);
    }
}

int tree_get(int bound){
    /*for(int i=0;i<days;i++)
        cout<<mn[TREE_SIZE+i]<<" ";
    cout<<endl;*/
    
    if(mx[1]-mn[1]<bound){
        return mn[TREE_SIZE+days-1]-mn[1];
    }
    
    auto res=tree_get2(1,0,TREE_SIZE,LLONG_MIN,LLONG_MAX,bound);
    //cout<<res.first.first<<" "<<res.first.second<<" "<<res.second<<"\n";
    
    /*int min_i=days-1,max_i=days-1;
    for(int i=days-1;i>=0;i--){
        if(mn[TREE_SIZE+i]<mn[TREE_SIZE+min_i])
            min_i=i;
        if(mn[TREE_SIZE+i]>mn[TREE_SIZE+max_i])
            max_i=i;
        if(mn[TREE_SIZE+max_i]-mn[TREE_SIZE+min_i]>=bound){
            if(max_i==i){
                cout<<mn[TREE_SIZE+max_i]<<" "<<mn[TREE_SIZE+min_i]<<" "<<i<<"\n";
                return mn[TREE_SIZE+days-1]-mn[TREE_SIZE+min_i];
            }else{
                cout<<mn[TREE_SIZE+max_i]<<" "<<mn[TREE_SIZE+min_i]<<" "<<i<<"\n";
                return bound-(mn[TREE_SIZE+max_i]-mn[TREE_SIZE+days-1]);
            }
        }
    }*/
    
    if(res.first.first==mn[TREE_SIZE+res.second]){
        //cout<<mn[TREE_SIZE+days-1]<<" "<<mn[TREE_SIZE+min_i]<<" "<<i<<"\n";
        return mn[TREE_SIZE+days-1]-res.first.second;
    }else{
        //cout<<mn[TREE_SIZE+max_i]<<" "<<mn[TREE_SIZE+days-1]<<" "<<i<<"\n";
        return bound-(res.first.first-mn[TREE_SIZE+days-1]);
    }
    
    //cout<<"?\n";
    //return mn[TREE_SIZE+days-1]-mn[TREE_SIZE+min_i];
    return 0;
}

vector<int>distribute_candies(vector<int>c,vector<int>l,vector<int>r,vector<int>v){
    n=(int)c.size();
    days=(int)v.size()+1;
    vector<vector<pair<int,int>>>events;
    events.resize(n+1);
    
    if(n>2000||days>2001)
        return{};
    
    for(int i=0;i<days-1;i++){
        events[l[i]].push_back({i+1,v[i]});
        events[r[i]+1].push_back({i+1,-v[i]});
    }
    
    vector<int>s(n);
    tree_init();
    
    for(int i=0;i<n;i++){
        for(auto event:events[i])
            tree_add(event.first,event.second);
        s[i]=tree_get(c[i]);
    }
    
    return s;
}

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