#include "wall.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 2000005;
pair<int, int> seg[4 * N];
void update(int s, int e, int i, int l, int r, int cur, bool op)
{
cur = max(cur, seg[i].first);
cur = min(cur, seg[i].second);
if (l > e || r < s)
{
return;
}
if (l >= s && r <= e)
{
if (!op)
{
seg[i].first = cur;
}
else
{
seg[i].second = cur;
}
return;
}
int mid = (l + r) / 2;
update(s, e, i * 2, l, mid, cur, op);
update(s, e, i * 2 + 1, mid + 1, r, cur, op);
}
void modify(int l, int r, int i, int cur, int *ans)
{
cur = max(cur, seg[i].first);
cur = min(cur, seg[i].second);
if (l == r)
{
ans[l] = cur;
return;
}
int mid = (l + r) / 2;
modify(l, mid, i * 2, cur, ans);
modify(mid + 1, r, i * 2 + 1, cur, ans);
}
void buildWall(int n, int k, int op[], int l[], int r[], int h[], int ans[])
{
for (int i = 1; i <= 4 * n; i++)
{
seg[i] = {0, 1e18};
}
for (int i = k - 1; i >= 0; i--)
{
update(l[i], r[i], 1, 0, n - 1, h[i], op[i] - 1);
}
modify(0, n - 1, 1, 0, ans);
return;
}
