Submission #597636

#	Time	Username	Problem	Language	Result	Execution time	Memory
597636		enerelt14	Wall (IOI14_wall)	C++14	100 / 100	786 ms	128020 KiB

wall

#include "wall.h"
#include<bits/stdc++.h>
using namespace std;
struct node{
    int lazy, mn, mx;
    node(){
        lazy=-1;
        mn=0;
        mx=0;
    }
};
node tree[8000005];
void propagate(int id, int l, int r){
    if (l==r)return;
    if (tree[id].lazy!=-1){
        tree[id*2+1].lazy=tree[id].lazy;
        tree[id*2+2].lazy=tree[id].lazy;
        tree[id*2+1].mn=tree[id].lazy;
        tree[id*2+2].mn=tree[id].lazy;
        tree[id*2+1].mx=tree[id].lazy;
        tree[id*2+2].mx=tree[id].lazy;
    }
    tree[id].mn=min(tree[id*2+1].mn, tree[id*2+2].mn);
    tree[id].mx=max(tree[id*2+1].mx, tree[id*2+2].mx);
    tree[id].lazy=-1;
}
void update(int x, int id, int l, int r, int L, int R, int h){
    if (l>R || L>r)return;
    if (!x && tree[id].mn>=h)return;
    if (x && tree[id].mx<=h)return;
    if (L<=l && r<=R && tree[id].mn==tree[id].mx){
        if (x){
            if (tree[id].lazy==-1)tree[id].lazy=h;
            else tree[id].lazy=min(tree[id].lazy, h);
            tree[id].mx=min(tree[id].mx, h);
            tree[id].mn=min(tree[id].mn, h);
        }
        else{
            tree[id].lazy=max(tree[id].lazy, h);
            tree[id].mx=max(tree[id].mx, h);
            tree[id].mn=max(tree[id].mn, h);
        }
        return;
    }
    propagate(id, l, r);
    int mid=(l+r)/2;
    update(x, id*2+1, l, mid, L, R, h);
    update(x, id*2+2, mid+1, r, L, R, h);
    tree[id].mn=min(tree[id*2+1].mn, tree[id*2+2].mn);
    tree[id].mx=max(tree[id*2+1].mx, tree[id*2+2].mx);
}
int x[2000005];
void build(int id, int l, int r){
    propagate(id, l, r);
    if (l==r){
        x[l]=tree[id].mn;
        return;
    }
    int mid=(l+r)/2;
    build(id*2+1, l, mid);
    build(id*2+2, mid+1, r);
}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    for (int i=0;i<k;i++){
        update(op[i]-1, 0, 0, n-1, left[i], right[i], height[i]);
    }
    build(0, 0, n-1);
    for (int i=0;i<n;i++)finalHeight[i]=x[i];
    return;
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 39 / 39