Submission #905970

#	Time	Username	Problem	Language	Result	Execution time	Memory
905970		GrandTiger1729	Teams (CEOI11_tea)	C++17	0 / 100	312 ms	35860 KiB

tea

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

vector<vector<int>> solve(int t, vector<pair<int, int>> a)
{
    int n = a.size();
    vector<vector<int>> ans;
    ans.emplace_back();
    for (int i = 0; i < a[0].first; i++)
    {
        ans.back().push_back(a[i].second);
    }
    int l = a[0].first;
    for (int i = l; i < n; i++)
    {
        if (i - l >= a[l].first)
        {
            ans.emplace_back();
            for (int j = l; j < i; j++)
            {
                ans.back().push_back(a[j].second);
            }
            l = i;
        }
        else if (i + a[i].first < l + a[l].first && ans.back().size() + i - l <= t)
        {
            for (int j = l; j < i; j++)
            {
                ans.back().push_back(a[j].second);
            }
            l = i;
        }
    }
    if (n - l >= a[l].first)
    {
        ans.emplace_back();
    }
    for (int i = l; i < n; i++)
    {
        ans.back().push_back(a[i].second);
    }
    return ans;
}

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    vector<pair<int, int>> a(n);
    for (int i = 0; i < n; i++)
    {
        int x;
        cin >> x;
        a[i] = make_pair(x, i);
    }
    sort(a.begin(), a.end(), greater<>());
    int l = a[0].first - 1, r = n;
    int t = solve(n, a).size();
    while (l < r - 1)
    {
        int mid = (l + r) / 2;
        (solve(mid, a).size() == t ? r : l) = mid;
    }
    auto ans = solve(r, a);
    cout << ans.size() << '\n';
    for (auto &res : ans)
    {
        cout << res.size() << ' ';
        for (int &i : res)
        {
            cout << i + 1 << ' ';
        }
        cout << '\n';
    }
    return 0;
}

Compilation message (stderr)

tea.cpp: In function 'std::vector<std::vector<int> > solve(int, std::vector<std::pair<int, int> >)':
tea.cpp:25:79: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |         else if (i + a[i].first < l + a[l].first && ans.back().size() + i - l <= t)
      |                                                     ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
tea.cpp: In function 'int main()':
tea.cpp:63:31: warning: comparison of integer expressions of different signedness: 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   63 |         (solve(mid, a).size() == t ? r : l) = mid;
      |          ~~~~~~~~~~~~~~~~~~~~~^~~~

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