Submission #306873

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
3068732020-09-26 12:34:08juggernaut벽 (IOI14_wall)C++14
100 / 100
813 ms69624 KiB
#include"wall.h"
#include<bits/stdc++.h>
using namespace std;
int flag[8000000][2];
void upd(int v,int mn,int mx){
flag[v][0]=min(max(flag[v][0],mn),mx);
flag[v][1]=min(max(flag[v][1],mn),mx);
}
void push(int v,int l,int r){
if(l!=r){
upd(v<<1,flag[v][0],flag[v][1]);
upd((v<<1)+1,flag[v][0],flag[v][1]);
}
flag[v][0]=0;
flag[v][1]=2e9;
}
void update(int v,int l,int r,int ql,int qr,int mn,int mx){
if(ql<=l&&r<=qr){
upd(v,mn,mx);
return;
}
if(r<ql||qr<l)return;
push(v,l,r);
int mid=(l+r)>>1;
update(v<<1,l,mid,ql,qr,mn,mx);
update((v<<1)+1,mid+1,r,ql,qr,mn,mx);
}
void build(int v,int l,int r,int* res){
if(l==r){
res[l]=flag[v][0];
 
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