oj.uz

답안 #362590

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
362590 2021-02-03T17:18:06 Z idk321 마상시합 토너먼트 (IOI12_tournament) C++11
100 / 100
 123 ms 16640 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 100000;

int tree[4 * N];
int rmq[N][20];
array<int, 2> best[N];
list<int>::iterator to[N];
list<int> l;

int* rnk;
int n;

void cons()
{
    for (int i = 0; i < n - 1; i++)
    {
        rmq[i][0] = rnk[i];
    }
    for (int j = 1; j < 20; j++)
    {
        for (int i = 0; i + (1 << j) - 1 < n - 1; i++)
        {
            rmq[i][j] = max(rmq[i][j - 1], rmq[i + (1 << (j - 1))][j - 1]);
        }
    }
}

int getMax(int from, int to)
{
    for (int i = 19; i >= 0; i--)
    {
        if (from + (1 << i) - 1 <= to)
        {
            return max(rmq[from][i], rmq[to - (1 << i) + 1][i]);
        }
    }

    return -1;
}

void make(int num, int i, int a, int b, int node)
{
    if (a == b)
    {
        tree[node] = num;
        return;
    }

    int mid =(a + b) / 2;
    if (i <= mid) make(num, i, a, mid, node * 2);
    if (i > mid) make(num, i, mid + 1, b, node * 2 + 1);

    tree[node] = tree[node * 2] + tree[node * 2 + 1];
}

int kth(int k, int a, int b, int node)
{
    if (a == b)
    {
        if (k == 0) return a;
        else return n;
    }

    int mid = (a + b) / 2;
    if (tree[node * 2] > k) return kth(k, a, mid, node * 2);
    return kth(k - tree[node * 2], mid + 1, b, node * 2 + 1);
}


int GetBestPosition(int xd, int c, int r, int *K, int *s, int *e) {
    n = xd;
    rnk = K;

    for (int i = 0; i < n; i++)
    {
         l.push_back(i);
         best[i] = {i, 0};
         make(1, i, 0, n - 1, 1);
    }

    int i = 0;
    auto it = l.begin();
    while (i < n)
    {
        to[i] = it;
        i++;
        it++;
    }

    cons();
    for (int i = 0; i < c; i++)
    {
        int a = s[i];
        int b = e[i];

        int x = kth(a, 0, n - 1, 1);
        int y = kth(b + 1, 0, n - 1, 1) - 1;
        int cur = getMax(x, y - 1);
        auto it = to[x];
        auto cbest = best[x];
        //cout << x << " " << y << endl;
        it++;
        while(it != l.end() && *it <= y)
        {
            if (best[*it][1] > cbest[1])
            {
                cbest = best[*it];
            }
            make(0, *it, 0, n - 1, 1);
            it = l.erase(it);
        }
        if (cur < r)cbest[1]++;
        best[x] = cbest;
    }

    auto res = best[0];
    for (int i = 1; i < n; i++)
    {
        if (best[i][1] > res[1]) res = best[i];
    }
    //cout << res[1] << endl;
    return res[0];
}

/*
5 3 3
1
0
2
4
1 3
0 1
0 1
*/

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1132 KB Output is correct
2 Correct 1 ms 1132 KB Output is correct
3 Correct 2 ms 1132 KB Output is correct
4 Correct 1 ms 1132 KB Output is correct
5 Correct 1 ms 1132 KB Output is correct
6 Correct 1 ms 1132 KB Output is correct
7 Correct 1 ms 1132 KB Output is correct
8 Correct 2 ms 1132 KB Output is correct
9 Correct 2 ms 1132 KB Output is correct
10 Correct 1 ms 1132 KB Output is correct

Subtask #2
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1260 KB Output is correct
2 Correct 5 ms 1900 KB Output is correct
3 Correct 4 ms 1772 KB Output is correct
4 Correct 7 ms 1900 KB Output is correct
5 Correct 6 ms 1772 KB Output is correct
6 Correct 5 ms 1900 KB Output is correct
7 Correct 5 ms 1900 KB Output is correct
8 Correct 5 ms 1900 KB Output is correct
9 Correct 3 ms 1772 KB Output is correct
10 Correct 6 ms 1900 KB Output is correct

Subtask #3
51.0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 8044 KB Output is correct
2 Correct 96 ms 16620 KB Output is correct
3 Correct 71 ms 14932 KB Output is correct
4 Correct 123 ms 16640 KB Output is correct
5 Correct 97 ms 16108 KB Output is correct
6 Correct 107 ms 15980 KB Output is correct
7 Correct 103 ms 16620 KB Output is correct
8 Correct 100 ms 16620 KB Output is correct
9 Correct 60 ms 14828 KB Output is correct
10 Correct 67 ms 14956 KB Output is correct