Submission #579781

#	Time	Username	Problem	Language	Result	Execution time	Memory
579781		AugustinasJucas	Carnival Tickets (IOI20_tickets)	C++14	100 / 100	824 ms	127512 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
using namespace std;
vector<vector<int> > mas, ans;
vector<vector<pair<int, int> > > maz, did, pos;
long long check(int n, int m, int k) {
    vector<vector<int> > vec(m);
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++) {
            if(ans[i][j] == -1) continue;
            vec[ans[i][j]].push_back(mas[i][j]);
        }
    }
    long long ret = 0;
    for(int i = 0; i < k; i++) {
        sort(vec[i].begin(), vec[i].end());
        for(int j = 0; j < vec[i].size(); j++) {
            if(j < vec[i].size() / 2) {
                ret -= vec[i][j];
            }else {
                ret += vec[i][j];
            }
        }
    }
    return ret;
}
/*
2 3 3
1 2 3
3 1 4
*/
long long find_maximum(int k, vector<vector<int> > x) {
    int n = x.size();
    int m = x[0].size();
    mas = ans = x;
    for(auto &x : ans) for(auto &y : x) y = -1;
    maz.resize(n); did.resize(n); pos.resize(n);
    long long sum = 0;
    priority_queue<pair<long long, int> > q;
    for(int i = 0; i < n; i++) {
        vector<pair<int, int> > dd, mm;
        for(int j = 0; j < m; j++) {
            dd.push_back({x[i][j], j});
            mm.push_back({x[i][j], j});
        }
        sort(mm.begin(), mm.end());
        sort(dd.begin(), dd.end());
        reverse(dd.begin(), dd.end());
        for(int j = 0; j < k; j++) {
            sum -= mm[j].first; 
            maz[i].push_back(mm[j]);
            pos[i].push_back(dd[j]);
        }
        reverse(pos[i].begin(), pos[i].end());
            
        q.push({pos[i].back().first + maz[i].back().first, i});
    }
    //cout << "kai visi minusai, sum = " << sum << endl;
    for(int i = 0; i < n * k / 2; i++) {
        long long pl = q.top().first;
        int ind = q.top().second;
        q.pop();
        sum += pl;
        //cout << "taciau galiu paimti ir sukeisti eileje " << ind << ", " << maz[ind].back().second << " su " << pos[ind].back().second << endl;
        maz[ind].pop_back();
        did[ind].push_back(pos[ind].back());
        pos[ind].pop_back();

        if(pos[ind].size()) {
            q.push({pos[ind].back().first + maz[ind].back().first, ind});
        }
    }
    /*cout << "taigi:\n";
    for(int i = 0; i < n; i++) {
        cout << "eileje " << i << ", minusai: "; for(auto &x : maz[i]) cout << x.second << " ";
        cout << ", pliusai: "; for(auto x : did[i]) cout << x.second <<  " ";
        cout << endl;
    }*/
    /*
    for(int i = 0; i < n; i++) {
        for(auto &x : maz[i]) ans[]
    } */
    
    vector<pair<int, int> > bal (k);
    for(int i = 0; i < k; i++) {
        bal[i] = {0, i};
    }
  //  cout << "start" << endl;
    for(int i = 0; i < n; i++) {
        int i1 = 0; int i2 = 0;
        for(int jj = 0; jj < k; jj++) {
            int j = bal[jj].second;
            if(i1 == did[i].size()) {
                ans[i][maz[i][i2].second] = j; 
                i2++;
            }else {
                if(bal[jj].first != n / 2) {
                    ans[i][did[i][i1].second] = j;
                    i1++;
                    bal[jj].first++;
                }else {
//                    cout << "i2 = " << i2 << ", maz[i].size() = " << maz[i].size() << endl;
                    ans[i][maz[i][i2].second] = j; 
                    i2++;
                }
            }
        }
        sort(bal.begin(), bal.end());
    }


    allocate_tickets(ans);
    
    //auto turi = check(n, m,k);
    //cout << "turi " << turi << endl;
    return sum;

/*

2 3 2
0 2 5
1 1 3

4 2 1
5 9
1 4
3 6
2 7



*/
	//allocate_tickets(answer);
}

Compilation message (stderr)

tickets.cpp: In function 'long long int check(int, int, int)':
tickets.cpp:17:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |         for(int j = 0; j < vec[i].size(); j++) {
      |                        ~~^~~~~~~~~~~~~~~
tickets.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |             if(j < vec[i].size() / 2) {
      |                ~~^~~~~~~~~~~~~~~~~~~
tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:93:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |             if(i1 == did[i].size()) {
      |                ~~~^~~~~~~~~~~~~~~~

• 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