Submission #1283320

#	Time	Username	Problem	Language	Result	Execution time	Memory
1283320		kawhiet	Diversity (CEOI21_diversity)	C++20	4 / 100	216 ms	580 KiB

diversity

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

constexpr int64_t inf = 1e18;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, q;
    cin >> n >> q;
    map<int, int> m;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        m[x]++;
    }
    while (q--) {
        int l, r;
        cin >> l >> r;
    }
    vector<int> a;
    for (auto [_, cnt] : m) {
        a.push_back(cnt);
    }
    sort(a.begin(), a.end());
    n = a.size();
    int64_t res = inf;
    do {
        int64_t sum = 0;
        for (int s = 0; s < n; s++) {
            for (int i = 0; i + s < n; i++) {
                int j = i + s;
                if (i == j) {
                    sum += 1LL * (a[i] * (a[i] - 1) / 2 + a[i]) * (s + 1);
                } else {
                    sum += 1LL * a[i] * a[j] * (s + 1);
                }
            }
        }
        res = min(res, sum);
    } while (next_permutation(a.begin(), a.end()));
    cout << res << '\n';
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 16
• Subtask 5: 0 / 26
• Subtask 6: 0 / 36