This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
struct segtree{
int n;
vector<int>d,u,ans;
segtree(int n):n(n){
d.resize(4*n);
u.resize(4*n);
ans.resize(n);
build(1,0,n-1);
}
void combine(int node,int D,int U){
d[node]=min(d[node],D);
d[node]=max(d[node],U);
u[node]=max(u[node],U);
u[node]=min(u[node],D);
}
void build(int node,int l,int r){
if(l==r){
d[node]=1e9;
u[node]=0;
return;
}
int mid=(l+r)/2;
build(node*2,l,mid);
build(node*2+1,mid+1,r);
}
void update(int node,int l,int r,int L,int R,int val,int type){
if(L>R||r<L||R<l) return;
if(L<=l&&r<=R){
if(type==1){
d[node]=max(d[node],val);
u[node]=max(u[node],val);
}
else{
d[node]=min(d[node],val);
u[node]=min(u[node],val);
}
return;
}
combine(node*2,d[node],u[node]);
combine(node*2+1,d[node],u[node]);
d[node]=1e9;
u[node]=0;
int mid=(l+r)/2;
update(node*2,l,mid,L,R,val,type);
update(node*2+1,mid+1,r,L,R,val,type);
}
void findAns(int node,int l,int r){
if(l==r){
ans[l]=min(d[node],u[node]);
return;
}
combine(node*2,d[node],u[node]);
combine(node*2+1,d[node],u[node]);
int mid=(l+r)/2;
findAns(node*2,l,mid);
findAns(node*2+1,mid+1,r);
}
vector<int>f(){
return ans;
}
};
void buildWall(int n, int k, int op[], int l[], int r[], int h[], int H[]){
segtree sg(n);
for(int i=0;i<k;i++){
sg.update(1,0,n-1,l[i],r[i],h[i],op[i]);
}
sg.findAns(1,0,n-1);
vector<int>v=sg.f();
for(int i=0;i<n;i++){
H[i]=v[i];
}
}
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