Submission #261592

#	Time	Username	Problem	Language	Result	Execution time	Memory
261592		Hehehe	Wall (IOI14_wall)	C++14	100 / 100	849 ms	77688 KiB

wall

#include<bits/stdc++.h> //:3
using namespace std;
typedef long long ll;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define sz(x) (int)((x).size())
//#define int long long
#include "wall.h"

const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};

const int inf = 2e9;
const ll mod = 1e9 + 7;
const int N = 2e6 + 11;
const ll INF64 = 3e18 + 1;
const double eps = 1e-14;
const double PI = acos(-1);

//ifstream in(".in");
//ofstream out(".out");

int mx[4*N], mn[4*N], ans[N];

void build(int v, int l, int r){
    mx[v] = 0;
    mn[v] = inf;
    if(l == r)return;
    int mid = (l + r) >> 1;
    build(2*v, l, mid);
    build(2*v + 1, mid + 1, r);
}

void push(int v, int l, int r){
    if(l == r)return;

    int L = 2*v, R = 2*v + 1;

    mx[L] = min(mx[L],mn[v]);
    mn[L] = min(mn[L],mn[v]);

    mn[L] = max(mn[L],mx[v]);
    mx[L] = max(mx[L],mx[v]);


    mx[R] = min(mx[R],mn[v]);
    mn[R] = min(mn[R],mn[v]);

    mn[R] = max(mn[R],mx[v]);
    mx[R] = max(mx[R],mx[v]);

    mn[v] = inf;
    mx[v] = 0;
}

void update(int v, int tl, int tr, int l, int r, int H, int type){

    //if(tl > r || tr < l)return;
    push(v, tl, tr);

    if(l <= tl && tr <= r){
        if(type == 1){
            mx[v] = max(mx[v], H);
            mn[v] = max(mn[v], H);
        }else{
            mx[v] = min(mx[v], H);
            mn[v] = min(mn[v], H);
        }
        return;
    }

    int mid = (tl + tr) >> 1;
    if(l <= mid)update(2*v, tl, mid, l, r, H, type);
    if(r > mid)update(2*v + 1, mid + 1, tr, l, r, H, type);
}

void WooHoo(int v, int l, int r){
    push(v, l, r);
    if(l == r){
        ans[l] = mx[v];
        return;
    }
    int mid = (l + r) >> 1;
    WooHoo(2*v, l, mid);
    WooHoo(2*v + 1, mid + 1, r);
}

void buildWall (int n, int k, int op[], int left[], int right[], int h[], int finalHeight[]){

    build(1, 1, n);

    for(int i = 0; i < k; i++){
        update(1, 1, n, left[i] + 1, right[i] + 1, h[i], op[i]);
    }

    WooHoo(1, 1, n);

    for(int i = 0; i < n; i++)finalHeight[i] = ans[i + 1];

}

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