Submission #1052022

#	Time	Username	Problem	Language	Result	Execution time	Memory
1052022		MarwenElarbi	Distributing Candies (IOI21_candies)	C++17	0 / 100	294 ms	12372 KiB

candies

#include <bits/stdc++.h>
using namespace std;
#include "candies.h"
#define fi first
#define se second
const int nax=2e5+5;
vector<int> tab;
int segtree[nax*4];
int lazy[nax*4];
int mx;
void upd(int pos,int l,int r,int value){
    segtree[pos]+=value;
    segtree[pos]=max(segtree[pos],0);
    segtree[pos]=min(segtree[pos],tab[r]);
    lazy[pos]+=value;
    return;
}
void propagate(int pos,int l,int r){
    if(lazy[pos]!=0){
        int mid=(r+l)/2;
        upd(pos*2+1,l,mid,lazy[pos]);
        upd(pos*2+2,mid+1,r,lazy[pos]);
    }lazy[pos]=0;
}
void update(int pos,int l,int r,int left,int right,int value){
    if(l>r||l>right||r<left) return;
    if(l>=left&&r<=right){
        upd(pos,l,r,value);
        return;
    }
    int mid=(r+l)/2;
    propagate(pos,l,r);
    update(pos*2+1,l,mid,left,right,value);
    update(pos*2+2,mid+1,r,left,right,value);
}
int query(int pos,int l,int r,int idx){
    if(l==r) return segtree[pos];
    int mid=(r+l)/2;
    propagate(pos,l,r);
    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();
    tab=c;
    sort(tab.begin(),tab.end());
    mx=c[0];
    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[i]) 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]);
        update(0,0,n-1,r,n-1,v[i]);
    }
    for (int i = 0; i < n; ++i)
    {
        ans[i]=query(0,0,n-1,i);
    }
    return ans;
}

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