Submission #426087

#	Time	Username	Problem	Language	Result	Execution time	Memory
426087		someone	Wall (IOI14_wall)	C++14	0 / 100	191 ms	10392 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
using namespace std;

struct Node {
    int deb, fin, a, b;
};

const int T = 4, M = 1 << T, N = 2*M, INF = 1e9;

Node node[N];

void applyOp(int i, int a, int b) {
    node[i].a = min(b, max(a, node[i].a));
    node[i].b = min(b, max(a, node[i].b));
}

void update(int i, int deb, int fin, int a, int b) {
    if(fin <= node[i].deb || node[i].fin <= deb)
        return;
    if(deb <= node[i].deb && node[i].fin <= fin) {
        applyOp(i, a, b);
        return;
    }
    applyOp(i*2, node[i].a, node[i].b);
    applyOp(i*2+1, node[i].a, node[i].b);

    node[i].a = -INF;
    node[i].b = INF;

    update(i*2, deb, fin, a, b);
    update(i*2+1, deb, fin, a, b);
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    for(int i = 0; i < M; i++) {
        node[i + M].deb = i;
        node[i + M].fin = i+1;
    }
    for(int i = M-1; i > -1; i--) {
        node[i].deb = node[i*2].deb;
        node[i].fin = node[i*2+1].fin;
    }
    for(int i = 0; i < N; i++)
        node[i].a = -INF, node[i].b = INF;
    for(int i = 0; i < k; i++) {
        if(op[i] == 1)
            update(1, left[i], right[i]+1, height[i], INF);
        else
            update(1, left[i], right[i]+1, -INF, height[i]);
    }
    for(int i = 1; i < M; i++) {
        applyOp(i*2, node[i].a, node[i].b);
        applyOp(i*2+1, node[i].a, node[i].b);
    }
    for(int i = 0; i < n; i++)
        finalHeight[i] = min(node[i+M].b, max(node[i+M].a, 0));
}

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