Submission #834179

#	Time	Username	Problem	Language	Result	Execution time	Memory
834179		andrey27_sm	Carnival Tickets (IOI20_tickets)	C++17	25 / 100	847 ms	177500 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
bool is_max[1501][1501];
set<int> a[1501];
int cnt[1501];
long long find_maximum(int k, vector<vector<int>> d) {
    int n = d.size();
    int m = d[0].size();
    int cnt0 = 0;
    for (int i = 0; i < n; ++i){
        for (int j = 0; j < m; ++j){
            cnt0+=1-2*d[i][j];
        }
    }
    if(cnt0 > 0){
        vector<vector<int>> ans(d.size(),vector<int>(d[0].size(),-1));
        ll sum = 0;
        vector<pair<int,pair<int,int>>> vals;
        for (int i = 0; i < n; ++i)
        {
            for (int j = 0; j < m; ++j)
            {
                vals.push_back({d[i][j],{i,j}});
                a[i].insert(j);
            }
        }
        sort(vals.begin(),vals.end());
        reverse(vals.begin(),vals.end());
        int last_max = 0;
        int J = 0;
        for (int i = 0; i < n*k/2+J; ++i)
        {
            if(cnt[vals[i].second.first] == k){
                J++;
                continue;
            }
            cnt[vals[i].second.first]++;
            //cout << "TAKE " << vals[i].second.first << " " << vals[i].second.second << "\n";
            is_max[vals[i].second.first][vals[i].second.second] = 1;
        }
        for (int i = 0; i < n; ++i)
        {
            for (int j = 0; j < m; ++j)
            {
                if(is_max[i][j]){
                    sum+=d[i][j];
                    a[i].erase(last_max);
                    ans[i][j] = last_max++;
                    last_max%=k;
                }
            }
        }
        for (int i = 0; i < n; ++i)
        {
            for (int j = 0; j+cnt[i] < k; ++j)
            {
                sum-=d[i][j];
                ans[i][j] = *a[i].begin();
                a[i].erase(a[i].begin());
            }
        }
        allocate_tickets(ans);
        return sum;
    }
    vector<vector<int>> ans(d.size(),vector<int>(d[0].size(),-1));
    ll sum = 0;
    vector<pair<int,pair<int,int>>> vals;
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < m; ++j)
        {
            vals.push_back({d[i][j],{i,j}});
            a[i].insert(j);
        }
    }
    sort(vals.begin(),vals.end());
    int last_max = 0;
    int J = 0;
    for (int i = 0; i < n*k/2+J; ++i)
    {
        if(cnt[vals[i].second.first] == k){
            J++;
            continue;
        }
        cnt[vals[i].second.first]++;
        is_max[vals[i].second.first][vals[i].second.second] = 1;
    }
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < m; ++j)
        {
            if(is_max[i][j]){
                sum+=d[i][j];
                a[i].erase(last_max);
                ans[i][j] = last_max++;
                last_max%=k;
            }
        }
    }
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j+cnt[i] < k; ++j)
        {
            sum-=d[i][m-1-j];
            ans[i][m-1-j] = *a[i].begin();
            a[i].erase(a[i].begin());
        }
    }
    allocate_tickets(ans);
    return -sum;
}

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