Submission #704172

#	Time	Username	Problem	Language	Result	Execution time	Memory
704172		bebra	Carnival Tickets (IOI20_tickets)	C++17	11 / 100	1 ms	724 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
 
#define dbg(x) cerr << #x << ": " << x << endl;
 
 
ll find_maximum(int k, vector<vector<int>> x) {
    int n = x.size();
    int m = x[0].size();

    vector<vector<int>> res(n, vector<int>(m, -1));

    vector<int> a(n);
    iota(a.begin(), a.end(), 0);
    sort(a.begin(), a.end(), [&](int lhs, int rhs) {
        return x[lhs][m - 1] - x[lhs][0] > x[rhs][m - 1] - x[rhs][0];
    });

    ll ans = 0;
    vector<int> s;
    for (int i = 0; i < n / 2; ++i) {
        res[a[i]][m - 1] = 0;
        s.push_back(x[a[i]][m - 1]);
    }
    for (int i = n / 2; i < n; ++i) {
        res[a[i]][0] = 0;
        s.push_back(x[a[i]][0]);
    }
    nth_element(s.begin(), s.begin() + n / 2, s.end());
    for (auto v : s) {
        ans += abs(v - s[n / 2]);
    }
    // for (int i = 0; i < n; ++i) {
    //     for (int j = 0; j < m; ++j) {
    //         cout << res[i][j] << ' ';
    //     }
    //     cout << '\n';
    // }
    allocate_tickets(res);
    return ans;
}
 
 
// int main() {
//     int n, m, k;
//     cin >> n >> m >> k;
 
//     vector<vector<int>> a(n, vector<int>(m));
//     for (int i = 0; i < n; ++i) {
//         for (int j = 0; j < m; ++j) {
//             cin >> a[i][j];
//         }
//     }
 
//     cout << find_maximum(k, a);
// }

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10