Submission #1066053

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066053		allin27x	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	345 ms	73140 KiB

tickets

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

void allocate_tickets(vector<vector<signed>> s);

int find_maximum(signed k, vector<vector<signed>> x) {
    int n = x.size(); int m = x[0].size();
    vector<vector<signed>> s(n, vector<signed>(m,-1));
    vector<int> left(n,0); vector<int> right(n,m-1);
    int ans = 0;
    for (int r=0; r<k; r++) {
        vector<pair<int,int>> p;
        for (int i = 0; i < n; i++) {
            p.push_back({x[i][left[i]] + x[i][right[i]], i});
        }
        sort(p.begin(), p.end());
        for (int i=0; i<n/2; i++) {
            int ind = p[i].second;
            ans -= x[ind][left[ind]];  s[ind][left[ind]] = r; left[ind] ++;
        }
        for (int i=n/2; i<n; i++) {
            int ind = p[i].second;
            ans -= x[ind][left[ind]]; ans += p[i].first; s[ind][right[ind]] = r; right[ind] --;
        }
    }

    allocate_tickets(s);
    return ans;
}

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