Submission #1147704

#	Time	Username	Problem	Language	Result	Execution time	Memory
1147704		brianhdzmdo	Wall (IOI14_wall)	C++20	24 / 100	349 ms	14004 KiB

wall

#include <iostream>
#include <algorithm>

using namespace std;

const int N = 2000005;
const int INF = 1000000000;

int ST[4 * N], lazyMax[4 * N], lazyMin[4 * N];

void init(int n) 
{
    for (int i = 1; i < 4 * n; i++) 
    {
        ST[i] = 0;
        lazyMax[i] = -1;
        lazyMin[i] = INF;
    }
}

void propagate(int node, int l, int r) 
{
    if (lazyMax[node] != -1) 
    {
        ST[node] = max(ST[node], lazyMax[node]);
        if (l != r) 
        {
            int left = 2 * node, right = 2 * node + 1;
            lazyMax[left] = max(lazyMax[left], lazyMax[node]);
            lazyMax[right] = max(lazyMax[right], lazyMax[node]);
        }
        lazyMax[node] = -1;
    }
    if (lazyMin[node] != INF) 
    {
        ST[node] = min(ST[node], lazyMin[node]);
        if (l != r) 
        {
            int left = 2 * node, right = 2 * node + 1;
            lazyMin[left] = min(lazyMin[left], lazyMin[node]);
            lazyMin[right] = min(lazyMin[right], lazyMin[node]);
        }
        lazyMin[node] = INF;
    }
}

void updateMax(int node, int l, int r, int a, int b, int h) 
{
    propagate(node, l, r);
    if (l > b || r < a) 
    {
        return;
    }
    if (a <= l && r <= b) 
    {
        lazyMax[node] = h;
        propagate(node, l, r);
        return;
    }
    int mid = (l + r) / 2, left = 2 * node, right = 2 * node + 1;
    updateMax(left, l, mid, a, b, h);
    updateMax(right, mid + 1, r, a, b, h);
    ST[node] = max(ST[left], ST[right]);
}

void updateMin(int node, int l, int r, int a, int b, int h) 
{
    propagate(node, l, r);
    if (l > b || r < a) 
    {
        return;
    }
    if (a <= l && r <= b) 
    {
        lazyMin[node] = h;
        propagate(node, l, r);
        return;
    }
    int mid = (l + r) / 2, left = 2 * node, right = 2 * node + 1;
    updateMin(left, l, mid, a, b, h);
    updateMin(right, mid + 1, r, a, b, h);
    ST[node] = min(ST[left], ST[right]);
}

void buildFinalHeights(int node, int l, int r, int finalHeight[]) 
{
    propagate(node, l, r);
    if (l == r) 
    {
        finalHeight[l] = ST[node];
        return;
    }
    int mid = (l + r) / 2, left = 2 * node, right = 2 * node + 1;
    buildFinalHeights(left, l, mid, finalHeight);
    buildFinalHeights(right, mid + 1, r, finalHeight);
}

void buildWall(int n, int k, int op[], int leftArr[], int rightArr[], int height[], int finalHeight[]) 
{
    init(n);
    for (int i = 0; i < k; i++) 
    {
        int a = leftArr[i], b = rightArr[i], h = height[i];
        if (op[i] == 1) 
        {
            updateMax(1, 0, n - 1, a, b, h);
        } 
        else 
        {
            updateMin(1, 0, n - 1, a, b, h);
        }
    }
    buildFinalHeights(1, 0, n - 1, finalHeight);
}

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