#include "wall.h"
#include "bits/stdc++.h"
using namespace std;
#define ll long long
#define forn(i,n) for(int i=0;i<n;i++)
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define sz(a) (int)a.size()
const int N = 2e6 + 10;
struct node{
ll mx;
ll mn;
int lazy;
};
node t[4 * N];
void push(int i, int l, int r){
if(t[i].lazy == -1)return;
t[i].mx = t[i].mn = t[i].lazy;
if(l != r){
t[2 * i].lazy = t[i].lazy;
t[2 * i + 1].lazy = t[i].lazy;
}
t[i].lazy = -1;
}
void modif(int i, int l, int r, int tl, int tr, int h, int type){
push(i, l, r);
if(l > tr || r < tl)return;
if(type == 0 && t[i].mn >= h)return;
if(type == 1 && t[i].mx <= h)return;
if(type == 0){
if(l >= tl && r <= tr && t[i].mx <= h){
t[i].lazy = h;
push(i, l, r);
return;
}
}
if(type == 1){
if(l >= tl && r <= tr && t[i].mn >= h){
t[i].lazy = h;
push(i, l, r);
return;
}
}
int mid = l + r >> 1;
modif(2 * i, l, mid, tl, tr, h, type);
modif(2 * i + 1, mid + 1, r, tl, tr, h, type);
t[i].mx = max(t[2 * i].mx, t[2 * i + 1].mx);
t[i].mn = min(t[2 * i].mn, t[2 * i + 1].mn);
}
ll ans[N];
void build(int i, int l, int r){
push(i, l, r);
if(l == r){
ans[l] = t[i].mx;
return;
}
int mid = l + r >> 1;
build(2 * i, l, mid);
build(2 * i + 1, mid + 1, r);
}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[])
{
for(int i = 0;i < 4 * N; ++i){
t[i].lazy = -1;
t[i].mn = t[i].mx = 0;
}
for(int i = 0;i < k; ++i){
int type = op[i], l = left[i], r = right[i], h = height[i];
--type;
modif(1, 0, n - 1, l, r, h, type);
}
build(1, 0, n - 1);
for(int i = 0;i < n; ++ i){
finalHeight[i] = ans[i];
}
return;
}
/*
void solve()
{
}
int32_t main()
{
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int t = 1;
//cin >> t;
while(t--)
{
solve();
}
}
*/
