Submission #558887

#	Time	Username	Problem	Language	Result	Execution time	Memory
558887		aryan12	Wall (IOI14_wall)	C++17	24 / 100	686 ms	103880 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 2e6 + 5;
int seg[N * 4];
vector<array<int, 3> > lazy(N * 4, {-1, 100001, -1});


void UpdateLazy(int l, int r, int pos)
{
    // if(l == 0 && r == 0 && lazy[pos].size() != 0)
    // {
    //     cout << "\n\n\n\n\n\n\n\n\n\n\n";
    //     cout << "lazy[pos].size() = " << lazy[pos].size() << "\n";
    //     cout << "\n\n\n\n\n\n\n\n\n\n\n";
    // }
    if(l != r)
    {
        lazy[pos * 2][0] = max(lazy[pos * 2][0], lazy[pos][0]);
        lazy[pos * 2][1] = min(lazy[pos * 2][1], lazy[pos][1]);

        lazy[pos * 2 + 1][0] = max(lazy[pos * 2 + 1][0], lazy[pos][0]);
        lazy[pos * 2 + 1][1] = min(lazy[pos * 2 + 1][1], lazy[pos][1]);

        if(lazy[pos][2] != -1)
        {
            lazy[pos * 2][2] = lazy[pos][2];
            lazy[pos * 2 + 1][2] = lazy[pos][2];
        }
        lazy[pos] = {-1, 100001, -1};
    }
    else
    {
        if(seg[pos] < lazy[pos][0]) seg[pos] = lazy[pos][0];
        if(seg[pos] > lazy[pos][1]) seg[pos] = lazy[pos][1];
        lazy[pos] = {-1, 100001, -1};
        return;
    }
    if(lazy[pos * 2][0] > lazy[pos * 2][1])
    {
        if(lazy[pos * 2][2] == 1)
        {
            lazy[pos * 2][1] = lazy[pos * 2][0];
        }
        else
        {
            lazy[pos * 2][0] = lazy[pos * 2][1];
        }
        // lazy[pos * 2][2] = -1;
    }
    if(lazy[pos * 2 + 1][0] > lazy[pos * 2 + 1][1])
    {
        if(lazy[pos * 2 + 1][2] == 1)
        {
            lazy[pos * 2 + 1][1] = lazy[pos * 2 + 1][0];
        }
        else
        {
            lazy[pos * 2 + 1][0] = lazy[pos * 2 + 1][1];
        }
        // lazy[pos * 2 + 1][2] = -1;
    }
}


int Query(int l, int r, int pos, int qpos)
{
    // cout << "l = " << l << ", r = " << r << ", pos = " << pos << ", qpos = " << qpos << "\n";
    UpdateLazy(l, r, pos);
    if(l == r)
    {
        return seg[pos];
    }
    int mid = (l + r) >> 1;
    if(qpos <= mid)
    {
        return Query(l, mid, pos * 2, qpos);
    }
    return Query(mid + 1, r, pos * 2 + 1, qpos);
}


void Update(int l, int r, int pos, int qoperation, int qleft, int qright, int qvalue)
{
    UpdateLazy(l, r, pos);
    if(qleft > r || l > qright)
    {
        // cout << "Update: (" << l << ", " << r << "), query range(" << qleft << ", " << qright << ", query operation and value: (" << qoperation << ", " << qvalue << ")\n"; 
        // cout << "no intersection\n";
        return;
    }
    if(l == r)
    {
        // cout << "Update: (" << l << ", " << r << "), query range(" << qleft << ", " << qright << ", query operation and value: (" << qoperation << ", " << qvalue << ")\n"; 
        // cout << "full intersection (point)\n";
        if(qoperation == 1) //adding phase
        {
            seg[pos] = max(seg[pos], qvalue);
        }
        else //removing phase
        {
            seg[pos] = min(seg[pos], qvalue);
        }
        return;
    }
    int mid = (l + r) >> 1;
    if(qleft <= l && r <= qright)
    {
        UpdateLazy(l, mid, pos * 2);
        UpdateLazy(mid + 1, r, pos * 2 + 1);
        // cout << "Update: (" << l << ", " << r << "), query range(" << qleft << ", " << qright << ", query operation and value: (" << qoperation << ", " << qvalue << ")\n"; 
        // cout << "full intersection (range)\n";
        if(qoperation == 1) // adding phase
        {
            lazy[pos * 2][0] = max(lazy[pos * 2][0], qvalue);
            lazy[pos * 2 + 1][0] = max(lazy[pos * 2 + 1][0], qvalue);
            lazy[pos * 2][2] = 1;
            lazy[pos * 2 + 1][2] = 1;
        }
        else
        {
            lazy[pos * 2][1] = min(lazy[pos * 2][1], qvalue);
            lazy[pos * 2 + 1][1] = min(lazy[pos * 2 + 1][1], qvalue);
            lazy[pos * 2][2] = 2;
            lazy[pos * 2 + 1][2] = 2;
        }
        return;
    }
    Update(l, mid, pos * 2, qoperation, qleft, qright, qvalue);
    Update(mid + 1, r, pos * 2 + 1, qoperation, qleft, qright, qvalue);
    // cout << "Update: (" << l << ", " << r << "), query range(" << qleft << ", " << qright << ", query operation and value: (" << qoperation << ", " << qvalue << ")\n"; 
    // cout << "partial intersection\n";
}


void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[])
{
    for(int i = 0; i < k; i++)
    {
        Update(0, n - 1, 1, op[i], left[i], right[i], height[i]);
        // cout << "QUERYING\n";
        // for(int j = 0; j < n; j++)
        // {
        //     cout << Query(0, n - 1, 1, j) << "\n";
        // }
        // cout << "\n\n\n\n\n";
    }
    for(int i = 0; i < n; i++)
    {
        finalHeight[i] = Query(0, n - 1, 1, i);
    }
}

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