Submission #1007468

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007468		u_suck_o	Carnival Tickets (IOI20_tickets)	C++17	11 / 100	1 ms	860 KiB

tickets

#include "tickets.h"
#include "bits/stdc++.h"
#define SZ 1505

using namespace std;

bool large[SZ][SZ], small[SZ][SZ];
bool used[SZ];

long long find_maximum(int k, vector<vector<int>> x) {
    int n = x.size();
    int m = x[0].size();
    vector<vector<int>> answer = vector<vector<int>>(n, vector<int>(m, -1));
    
    vector<pair<int, pair<int, int>>> v; //{number, {ticket color, ticket id}}
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            v.push_back({x[i][j], {i, j}});
        }
    }
    sort(v.begin(), v.end());
    
    long long ans = 0;
    int count = 0;
    for (int i = v.size()-1; i >= 0; i--) {
        if (count == n/2) break;
        if (!used[v[i].second.first]) {
            ans += v[i].first;
            answer[v[i].second.first][v[i].second.second] = 0;
            used[v[i].second.first] = true;
            count++;
        }
    }
    
    count = 0;
    for (int i = 0; i < v.size(); i++) {
        if (count == n/2) break;
        if (!used[v[i].second.first]) {
            ans -= v[i].first;
            answer[v[i].second.first][v[i].second.second] = 0;
            used[v[i].second.first] = true;
            count++;
        }
    }
    allocate_tickets(answer);
    return ans;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for (int i = 0; i < v.size(); i++) {
      |                     ~~^~~~~~~~~~

• 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