Submission #1203092

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203092		monstermceldritch	September (APIO24_september)	C++20	0 / 100	0 ms	320 KiB

september

#include <bits/stdc++.h>

using namespace std;
typedef vector<int> vi;
typedef vector<vi> vii;

int solve(int n, int m, vector<int> f, vector<vector<int>> s)
{
    vii children(n, vi());
    for (int i = 1; i < n; i++)
        children[f[i]].push_back(i);
    vector<bool> done(n, false);
    vector<pair<int, int>> earlyandlate(n - 1, pair<int, int>(make_pair(n, -1)));
    for (int i = 0; i < n - 1; i++)
    {
        for (int j = 0; j < m; j++)
        {
            int cur = s[j][i];
            earlyandlate[cur].first = min(earlyandlate[cur].first, i);
            earlyandlate[cur].second = max(earlyandlate[cur].second, i);
        }
    }
    int threshold = 0, ans = 0;
    for (int i = 0; i < n - 1; i++)
    {
        for (int l = 0; l < m; l++)
        {
            if (earlyandlate[s[l][i]].second > threshold)
            {
                for (int j = threshold + 1; j < earlyandlate[s[l][i]].second; j++)
                {
                    for (int k = 0; k < m; k++)
                        done[s[k][j]] = true;
                }
                threshold = earlyandlate[s[l][i]].second;
            }
            for (auto j : children[s[l][i]])
            {
                if (!done[j])
                {
                    for (int k = max(i + 1, threshold + 1); k < n - 1; k++)
                    {
                        bool over = false;
                        for (int a = 0; a < m; a++)
                        {
                            done[s[a][k]] = true;
                            if (s[a][k] == j)
                            {
                                threshold = k;
                                over = true;
                            }
                        }
                        if (over)
                            break;
                    }
                }
            }
            done[s[l][i]] = true;
        }
        if (i >= threshold)
            ans++;
    }
    return ans;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 5
• Subtask 4: 0 / 9
• Subtask 5: 0 / 5
• Subtask 6: 0 / 11
• Subtask 7: 0 / 9
• Subtask 8: 0 / 11
• Subtask 9: 0 / 9
• Subtask 10: 0 / 16