Submission #657952

#	Time	Username	Problem	Language	Result	Execution time	Memory
657952		mychecksedad	Carnival Tickets (IOI20_tickets)	C++17	0 / 100	1 ms	340 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;
    
    for (int i = 0; i < N; i++) {
        std::vector<int> row(M, -1);
        answer.push_back(row);
    }
    vector<vector<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 = k; 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) q.push({unused[j].back() + small[i].back(), i});
        for(int j = 0; j < N; ++j){
            int v = q.top().second;
            q.pop();
            if(j < N/2){
                ans += unused[v].back();
                answer[v][k - 1 + unused[v].size()] = i;
            }else{
                ans -= small[v].back();
                answer[v][small[v].size() - 1] = i;
            }
            unused[v].pop_back();
            small[v].pop_back();
        }
    }


 
    allocate_tickets(answer);
    return ans;
}

• Subtask 1: 0 / 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