제출 #657971

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
657971		mychecksedad	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	533 ms	101968 KiB

tickets

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define pb push_back
#define all(x) x.begin(), x.end()
 
void allocate_tickets(vector<vector<int>> _x);
 
long long find_maximum(int k, vector<vector<int>> _arr) {
    int N = _arr.size(), M = _arr[0].size();
    vector<vector<int>> answer;
    vector<vector<pair<int,int>>> arr(N);
    
    for (int i = 0; i < N; i++) {
        std::vector<int> row(M, -1);
        answer.push_back(row);
        for(int j = 0; j < M; ++j) arr[i].pb({_arr[i][j], j});
        sort(all(arr[i]));
    }
    vector<vector<pair<int,int>>> unused(N), small(N);
    
    ll ans = 0;


    for(int i = 0; i < N; ++i){
        for(int j = 0; j < k; ++j) small[i].pb(arr[i][j]);
        for(int j = 0; j < M; ++j) unused[i].pb(arr[i][j]);
    }
    for(int i = 0; i < k; ++i){
        priority_queue<pair<int, int>> q;
        for(int j = 0; j < N; ++j){
            while(answer[j][unused[j].back().second] != -1) unused[j].pop_back();
            q.push({unused[j].back().first + small[j].back().first, j});
        }
        for(int j = 0; j < N; ++j){
            int v = q.top().second;
            q.pop();
            if(j < N/2){
                ans += unused[v].back().first;
                answer[v][unused[v].back().second] = i;
                unused[v].pop_back();
            }else{
                ans -= small[v].back().first;
                answer[v][small[v].back().second] = i;
            }
            small[v].pop_back();
        }
    }


 
    allocate_tickets(answer);
    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