Submission #530176

#TimeUsernameProblemLanguageResultExecution timeMemory
530176pedroslreyTeams (CEOI11_tea)C++17
0 / 100
325 ms262148 KiB
#include <bits/stdc++.h>

using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n;
    cin >> n;

    vector<pair<int, int>> xs;
    for (int i = 0; i < n; ++i) {
        int x;
        cin >> x;

        xs.emplace_back(-x, i);
    }

    sort(xs.begin(), xs.end());

    vector<vector<int>> ans;
    for (int i = 0; i < n;) {
        ans.emplace_back();
        for (int j = i; j < i - xs[i].first; ++j)
            ans.back().push_back(xs[j].second);
        i += xs[i].first;
    }

    cout << ans.size() << '\n';
    for (auto xs: ans) {
        cout << xs.size() << " ";
        for (int x: xs)
            cout << x+1 << " ";
        cout << '\n';
    }
}
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