Submission #986878

#	Time	Username	Problem	Language	Result	Execution time	Memory
986878		MuntherCarrot	Wall (IOI14_wall)	C++14	61 / 100	449 ms	41044 KiB

wall

#include <bits/stdc++.h>
#include "wall.h"

using namespace std;

const int INF = 0x3f3f3f3f;
const int N = 1 << 17;
int t[N << 2];
int add[N << 2], del[N << 2];

void push(int i, int l, int r){
    if(l != r){
        add[i << 1] = min(add[i << 1], del[i]);
        add[i << 1] = max(add[i << 1], add[i]);
        del[i << 1] = min(del[i << 1], del[i]);
        del[i << 1] = max(del[i << 1], add[i]);
        add[i << 1 | 1] = min(add[i << 1 | 1], del[i]);
        add[i << 1 | 1] = max(add[i << 1 | 1], add[i]);
        del[i << 1 | 1] = min(del[i << 1 | 1], del[i]);
        del[i << 1 | 1] = max(del[i << 1 | 1], add[i]);
    }
}

void upd(int l, int r, int i, int from, int to, int val, int type){
    push(i, from, to);
    if(from > r || to < l) return;
    if(from >= l && to <= r){
        if(type == 1){
            add[i] = max(add[i], val);
            del[i] = max(del[i], val);
        }
        else{
            add[i] = min(add[i], val);
            del[i] = min(del[i], val);
        }
        push(i, from, to);
        return;
    }
    add[i] = 0, del[i] = INF;
    int mid = (from + to) >> 1;
    upd(l, r, i << 1, from, mid, val, type);
    upd(l, r, i << 1 | 1, mid + 1, to , val, type);
}

void pushall(int i, int l, int r){
    if(l == r) return;
    push(i, l, r);
    int mid = (l + r) >> 1;
    pushall(i << 1, l, mid);
    pushall(i << 1 | 1, mid + 1, r);
}

void buildWall(int n, int k, int op[], int l[], int r[], int h[], int ans[]){
    memset(del, INF, sizeof del);
    for(int i = 0; i < k; i++){
        upd(l[i], r[i], 1, 0, N - 1, h[i], op[i]);
    }
    pushall(1, 0, N - 1);
    for(int i = 0; i < n; i++){
        ans[i] = add[i + N];
    }
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 0 / 39