Submission #1052778

#	Time	Username	Problem	Language	Result	Execution time	Memory
1052778		MarwenElarbi	Distributing Candies (IOI21_candies)	C++17	29 / 100	548 ms	25284 KiB

candies

#include <bits/stdc++.h>
using namespace std;
#include "candies.h"
#define pb push_back
#define fi first
#define se second
const int nax=2e5+5;
vector<pair<int,int>> tab;
int segtree[nax*4];
long long lazy1[nax*4];
int lazy2[nax*4];
void propagate(int pos,int l,int r){
    int mid=(r+l)/2;
    if(l==r){
        segtree[pos]+=lazy1[pos];
        if(lazy2[pos]) segtree[pos]=(lazy2[pos]==1 ? 0 : tab[l].fi);
    }else if(lazy2[pos]!=0){
        lazy2[pos*2+1]=lazy2[pos*2+2]=lazy2[pos];
        lazy1[pos*2+1]=lazy1[pos*2+2]=0;
    }else if(lazy1[pos]!=0){
        if(lazy2[pos*2+1]!=0) propagate(pos*2+1,l,mid);
        if(lazy2[pos*2+2]!=0) propagate(pos*2+2,mid+1,r);
        lazy1[pos*2+1]+=lazy1[pos];
        lazy1[pos*2+2]+=lazy1[pos];
    }
    lazy1[pos]=lazy2[pos]=0;
    return;
}
void update(int pos,int l,int r,int left,int right,int type,int value){
    if(l>r||l>right||r<left) return;
    propagate(pos,l,r);
    if(l>=left&&r<=right){
        if(type){
            lazy2[pos]=type;
            lazy1[pos]=0;
        }else{
            lazy1[pos]+=value;
        }
        return;
    }
    int mid=(r+l)/2;
    update(pos*2+1,l,mid,left,right,type,value);
    update(pos*2+2,mid+1,r,left,right,type,value);
}
int query(int pos,int l,int r,int idx){
    propagate(pos,l,r);
    if(l==r){
        return segtree[pos];
    }
    int mid=(r+l)/2;
    if(idx<=mid) return query(pos*2+1,l,mid,idx);
    else return query(pos*2+2,mid+1,r,idx);
}
std::vector<int> distribute_candies(std::vector<int> c, std::vector<int> l,
                                    std::vector<int> r, std::vector<int> v) {
    int n = c.size();
    for (int i = 0; i < n; ++i) tab.pb({c[i],i});
    sort(tab.begin(),tab.end());
    vector<int> ans(n);
    for (int i = 0; i < (int)l.size(); ++i)
    {
        int l=-1;
        int r=n;
        while(r-l>1){
            int mid=(r+l)/2;
            if(v[i]>0){
                if(query(0,0,n-1,mid)+v[i]>=tab[mid].fi) l=mid;
                else r=mid;
            }else{
                if(query(0,0,n-1,mid)+v[i]<=0) l=mid;
                else r=mid;
            }
        }
        update(0,0,n-1,0,l,(v[i]>0 ? 2 : 1),v[i]);
        update(0,0,n-1,r,n-1,0,v[i]);
    }
    for (int i = 0; i < n; ++i)
    {
        ans[tab[i].se]=query(0,0,n-1,i);
    }
    return ans;
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 8
• Subtask 3: 0 / 27
• Subtask 4: 29 / 29
• Subtask 5: 0 / 33