Submission #317937

#	Time	Username	Problem	Language	Result	Execution time	Memory
317937		nickmet2004	Carnival Tickets (IOI20_tickets)	C++14	27 / 100	750 ms	51448 KiB

tickets

#include<bits/stdc++.h>
#include "tickets.h"
using namespace std;
int cnt[1505];
int n , m ,k;
vector<vector<int>>a;

long long find_maximum(int k , vector<vector<int>> a){
    int n = a.size() , m = a[0].size();
    /// nk/2 maximums - nk/2 minimums
    priority_queue<pair<int , int>> pq;
    long long ans = 0;
    for(int i = 0; i < n; ++i){
        for(int j = 0; j < k; ++j) ans += a[i][m - j - 1] ,pq.emplace(-a[i][j] - a[i][m - k + j] , i);
    }
    for(int i = 0; i < n * k / 2; ++i){
        auto x = pq.top(); pq.pop();
        cnt[x.second]++;
        ans += x.first;
    }
    vector<vector<int>> r(n , vector<int>(m , -1));
    for(int i = 0; i < n; ++i){
        int x = 0;
        for(int j = 0; j < cnt[i]; ++j) r[i][j] = x++;
        x %= k;
        for(int j = m - k + cnt[i]; j < m; ++j)r[i][j] = x++;
    }
    allocate_tickets(r);
    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