Submission #417439

#	Time	Username	Problem	Language	Result	Execution time	Memory
417439		iulia2100	Minerals (JOI19_minerals)	C++14	6 / 100	1099 ms	852 KiB

minerals

#include <iostream>
#include "minerals.h"

using namespace std;

//ifstream cin ("idk.in");
//ofstream cout ("idk.out");

const int N = 43005;

struct idk {
    int st, dr;
} interval[N + N];

int n, last_ans;
int index[N];
bool in_set[N + N];

void bs(int st, int dr, int other_half_st, int other_half_dr) {
    int x = last_ans;
    if (other_half_st > dr) { //sunt in partea stanga. Daca sunt in dreapta cunosc deja intervalele
        for (int i = 1; i < st; ++i)    {
            if (in_set[i])  {
                x = Query(index[i]);
                in_set[i] = false;
                last_ans = x;
            }
        }
        for (int i = st; i <= dr; ++i)  {
            if (!in_set[i]) {
                x = Query(index[i]);
                in_set[i] = true;
                last_ans = x;
            }
        }
        for (int i = dr + 1; i <= n + n; ++i)   {
            if (in_set[i])  {
                x = Query(index[i]);
                in_set[i] = false;
                last_ans = x;
            }
        }
        for (int i = n + 1; i <= n + n; ++i)    {
            if (interval[i].dr < st || interval[i].st > dr)
                continue;
            int aux = Query(index[i]);
            last_ans = aux;
            if (aux == x)   {
                interval[i].st = st, interval[i].dr = dr;
                last_ans = Query(index[i]);
            } else  {
                last_ans = Query(index[i]);
                interval[i].st = other_half_st;
                interval[i].dr = other_half_dr;
            }
        }
    }
    if (st == dr)   {
        return;
    }
    bs(st, (st + dr) / 2, (st + dr) / 2 + 1, dr);
    bs((st + dr) / 2 + 1, dr, st, (st + dr) / 2);
}

void find_index()   {
    int last = 0, nd = n, st = 0;
    for (int i = 1; i <= n + n; ++i)    {
        int x = Query(i);
        last_ans = x;
        if (x == last)  {
            last_ans = Query(i);
            continue;
        }
        in_set[i] = true;
        last = x;
    }
    for (int i = 1; i <= n + n; ++i)    {
        if (!in_set[i])
            index[++nd] = i;
        else index[++st] = i;
    }
    for (int i = 1; i <= n; ++i)    {
        in_set[i] = true;
        in_set[i + n] = false;
    }
//    cout << '\n';
//    for (int i = 1; i <= n + n; ++i)
//        cout << index[i] << ' ';
}

void Solve(int aux_n)   {
    n = aux_n;
    find_index();
    for (int i = 1; i <= n; ++i)
        interval[i + n] = {1, n};
    bs(1, n / 2, n / 2 + 1, n);
    bs(n / 2 + 1, n, 1, n / 2);
    for (int i = 1; i <= n; ++i)    {
        Answer(index[interval[i + n].st], index[i + n]);
    }
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 25
• Subtask 3: 0 / 9
• Subtask 4: 0 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10