Submission #719821

#	Time	Username	Problem	Language	Result	Execution time	Memory
719821		ovidiush11	Wall (IOI14_wall)	C++14	8 / 100	165 ms	35220 KiB

wall

#include <bits/stdc++.h>
#include "wall.h"

using namespace std;

#define ff first
#define ss second

const int inf = 1e9;
const int K = 5e5;

int amn[2*K],amx[2*K];
int pos[K];

void build(int p,int l,int r)
{
    if(l == r)pos[l] = p;
    else
    {
        int m = (l + r) / 2;
        build(p*2,l,m);
        build(p*2+1,m+1,r);
    }
    amn[p] = 0;
    amx[p] = inf;
    return ;
}

void change(int p)
{
    if(p == 0)return ;
    int mx = min(amx[p*2],amx[p*2+1]);
    int mn = max(amn[p*2],amn[p*2+1]);
    if(mn > mx)
    {
        if(mn == amn[p*2+1])mx = mn;
        else mn = mx;
    }
    amn[p] = mn;
    amx[p] = mx;
    change(p / 2);
    return ;
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[])
{
    queue<int> vq[n+1];
    build(1,0,k-1);
    for(int i = 0;i < k;i++)vq[left[i]].push(i);
    for(int i = 0;i < k;i++)vq[right[i]+1].push(i);
    for(int i = 0;i < n;i++)
    {
        while(!vq[i].empty())
        {
            int v = vq[i].front();
            vq[i].pop();
            if(amn[pos[v]] == 0 && amx[pos[v]] == inf)
            {
                if(op[v] == 1)amn[pos[v]] = height[v];
                else amx[pos[v]] = height[v];
            }
            else
            {
                amn[pos[v]] = 0;
                amx[pos[v]] = inf;
            }
            change(pos[v] / 2);
        }
        finalHeight[i] = amn[1];
    }
    return ;
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39