Submission #309312

#	Time	Username	Problem	Language	Result	Execution time	Memory
309312		tjdgus4384	Carnival Tickets (IOI20_tickets)	C++14	100 / 100	1250 ms	54604 KiB

tickets

#include<bits/stdc++.h>
#include "tickets.h"
using namespace std;
int cnt1[1501], cnt2[1501];

long long find_maximum(int k, vector<vector<int> > x){
    vector<vector<int> > s(x.size());
    for(int i = 0;i < s.size();i++) s[i].resize(x[0].size(), -1);
    vector<pair<int, int> > v;
    long long ret = 0;

    priority_queue<pair<pair<long long, int>, pair<int, int> > > pq;
    for(int i = 0;i < x.size();i++){
        for(int j = 0;j < k;j++){
            ret -= x[i][j];
            cnt1[i]++;
        }
        pq.push({{x[i].back() + x[i][k - 1], i}, {x[i].size() - 1, k - 1}});
    }
    for(int i = 0;i < k*x.size()/2;i++){
        ret += pq.top().first.first;
        int a = pq.top().second.first;
        int b = pq.top().second.second;
        int c = pq.top().first.second;
        cnt1[c]--; cnt2[c]++;
        pq.pop();
        if(a == 0 || b == 0) continue;
        pq.push({{x[c][a-1] + x[c][b-1], c}, {a-1, b-1}});
    }

    for(int i = 0;i < x.size();i++) v.push_back({cnt1[i], cnt2[i]});

    priority_queue<pair<pair<int, int>, int> > q;
    for(int i = 0;i < k;i++){
        for(int j = 0;j < x.size();j++) q.push({{v[j].first, v[j].second}, j});
        for(int j = 0;j < x.size()/2;j++){
            s[q.top().second][q.top().first.first-1] = i;
            v[q.top().second].first--;
            q.pop();
        }
        for(int j = 0;j < x.size()/2;j++){
            s[q.top().second][x[0].size()-q.top().first.second] = i;
            v[q.top().second].second--;
            q.pop();
        }
    }
    allocate_tickets(s);
    return ret;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:8:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i = 0;i < s.size();i++) s[i].resize(x[0].size(), -1);
      |                   ~~^~~~~~~~~~
tickets.cpp:13:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for(int i = 0;i < x.size();i++){
      |                   ~~^~~~~~~~~~
tickets.cpp:20:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i = 0;i < k*x.size()/2;i++){
      |                   ~~^~~~~~~~~~~~~~
tickets.cpp:31:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i = 0;i < x.size();i++) v.push_back({cnt1[i], cnt2[i]});
      |                   ~~^~~~~~~~~~
tickets.cpp:35:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(int j = 0;j < x.size();j++) q.push({{v[j].first, v[j].second}, j});
      |                       ~~^~~~~~~~~~
tickets.cpp:36:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(int j = 0;j < x.size()/2;j++){
      |                       ~~^~~~~~~~~~~~
tickets.cpp:41:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         for(int j = 0;j < x.size()/2;j++){
      |                       ~~^~~~~~~~~~~~

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