Submission #621438

#	Time	Username	Problem	Language	Result	Execution time	Memory
621438		2fat2code	Wall (IOI14_wall)	C++17	100 / 100	803 ms	93768 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
#define fr first
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define sc second
#define all(s) s.begin(), s.end()
//#define int long long
#define rc(s) return cout << s, 0
using namespace std;

const int nmax = 2000005;

int mini[4*nmax], maxi[4*nmax], lazy[4*nmax];
vector<int>ans;

void push(int l, int r, int nod){
    if(lazy[nod]){
        if(maxi[nod] < mini[2 * nod]) mini[2 * nod] = maxi[nod];
        else mini[2 * nod] = max(mini[2 * nod], mini[nod]);
        if(mini[nod] > maxi[2 * nod]) maxi[2 * nod] = mini[nod];
        else maxi[2 * nod] = min(maxi[2 * nod], maxi[nod]);
        if(maxi[nod] < mini[2 * nod + 1]) mini[2 * nod + 1] = maxi[nod];
        else mini[2 * nod + 1] = max(mini[2 * nod + 1], mini[nod]);
        if(mini[nod] > maxi[2 * nod + 1]) maxi[2 * nod + 1] = mini[nod];
        else maxi[2 * nod + 1] = min(maxi[2 * nod + 1], maxi[nod]);
        int mid = l + (r - l) / 2;
        if(l != mid) lazy[2 * nod] = 1;
        if(mid + 1 != r) lazy[2 * nod + 1] = 1;
    }
    lazy[nod] = 0;
}

void update(int l, int r, int le, int ri, int op, int val, int nod){
    push(l, r, nod);
    if(r < le || l  > ri) return;
    else if(l >= le && r <= ri){
        if(op == 1){
            mini[nod] = max(mini[nod], val);
            maxi[nod] = max(maxi[nod], val);
        }
        else{
            maxi[nod] = min(maxi[nod], val);
            mini[nod] = min(mini[nod], val);
        }
        if(l != r) lazy[nod] = 1;
    }
    else{
        int mid = l + (r - l) / 2;
        update(l, mid, le, ri, op, val, 2*nod);
        update(mid + 1, r, le, ri, op, val, 2 * nod + 1);
        mini[nod] = min(mini[2 * nod], mini[2 * nod + 1]);
        maxi[nod] = max(maxi[2 * nod], maxi[2 * nod + 1]);
    }
}

void dfs(int l, int r, int nod){
    push(l, r, nod);
    if(l == r) ans[l] = mini[nod];
    else{
        int mid = l + (r - l) / 2;
        dfs(l, mid, 2 * nod);
        dfs(mid + 1, r, 2 * nod + 1);
    }
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    for(int i=0;i<k;i++){
        update(1, n, left[i] + 1, right[i] + 1, op[i], height[i], 1);
    }
    ans.resize(n + 1);
    dfs(1, n, 1);
    for(int i=0;i<n;i++) finalHeight[i] = ans[i + 1];
    return;
}

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