#include "wall.h"
#include <bits/stdc++.h>
#define pb push_back
#define lc v << 1
#define rc v << 1 | 1
using namespace std;
const int N = 2e6 + 10, inf = 1.05e9;
int n, k, fl[N], fr[N];
vector<int> L[N], R[N];
void build(int v, int l, int r){
fl[v] = 0;
fr[v] = inf;
if(r - l > 1){
int m = (l + r) >> 1;
build(lc, l, m);
build(rc, m, r);
}
}
void upd(int v, int l, int r, int p, int lh, int rh){
if(r - l == 1){
fl[v] = lh;
fr[v] = rh;
return;
}
int m = (l + r) >> 1;
if(p < m) upd(lc, l, m, p, lh, rh);
else upd(rc, m, r, p, lh, rh);
fl[v] = fl[lc];
if(fl[rc] > fl[v]) fl[v] = fl[rc];
if(fr[rc] < fl[v]) fl[v] = fr[rc];
fr[v] = fr[lc];
if(fr[rc] < fr[v]) fr[v] = fr[rc];
if(fl[rc] > fr[v]) fr[v] = fl[rc];
}
void buildWall(int wtn, int wtk, int op[], int left[], int right[], int height[], int finalHeight[]){
n = wtn;
k = wtk;
int LH[k],RH[k];
for(int i = 0; i < k; i++){
L[left[i]].pb(i);
R[right[i]].pb(i);
if(op[i] == 1){
LH[i] = height[i];
RH[i] = inf;
}else{
LH[i] = 0;
RH[i] = height[i];
}
}
build(1, 0, k);
for(int i = 0; i < n; i++){
for(int j : L[i]) upd(1, 0, k, j, LH[j], RH[j]);
finalHeight[i] = fl[1];
for(int j : R[i]) upd(1, 0, k, j, 0, inf);
}
return;
}
