Submission #309285

#	Time	Username	Problem	Language	Result	Execution time	Memory
309285		tjdgus4384	Carnival Tickets (IOI20_tickets)	C++14	11 / 100	761 ms	53752 KiB

tickets

#include<bits/stdc++.h>
#include "tickets.h"
using namespace std;
bool chk[1501][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);
    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];
            chk[i][j] = true;
        }
        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;
        chk[c][b] = false; chk[c][a] = true;
        pq.pop();
        pq.push({{x[c][a-1] + x[c][b-1], c}, {a-1, b-1}});
    }

    for(int i = 0;i < x.size();i++){
        int cnt = k - 1, cntp = -1;
        if(i%2 == 0) cnt = 0, cntp = 1;
        for(int j = 0;j < x[i].size();j++){
            if(chk[i][j]){
                s[i][j] = cnt;
                cnt += cntp;
            }
        }
    }
    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:12:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     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:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int i = 0;i < x.size();i++){
      |                   ~~^~~~~~~~~~
tickets.cpp:33:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         for(int j = 0;j < x[i].size();j++){
      |                       ~~^~~~~~~~~~~~~

• Subtask 1: 11 / 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