Submission #430652

#	Time	Username	Problem	Language	Result	Execution time	Memory
430652		MeGustaElArroz23	Carnival Tickets (IOI20_tickets)	C++14	41 / 100	888 ms	77796 KiB

tickets

#include "tickets.h"
#include<bits/stdc++.h>

#define fi first
#define se second

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef pair<pii,int> piii;
typedef vector<piii> viii;

bool casobinario(vvi v){
    for (vi w:v){
        for (int x:w){
            if (x>1) return 0;
        }
    }
    return 1;
}

int minind(vi v){
    int sol=0;
    for (int i=0;i<v.size();i++){
        if (v[i]<v[sol]) sol=i;
    }
    return sol;
}

int maxind(vi v){
    int sol=0;
    for (int i=0;i<v.size();i++){
        if (v[i]>v[sol]) sol=i;
    }
    return sol;
}

bool orden(piii a, piii b){ return a.fi.fi+a.fi.se<b.fi.fi+b.fi.se; }

long long find_maximum(int k, std::vector<std::vector<int>> x) {
	int n = x.size();
	int m = x[0].size();
    if (m==1){
        allocate_tickets(vvi(n,vi(1,0)));
        vi v;
        for (int i=0;i<n;i++) v.push_back(x[i][0]);
        sort(v.begin(),v.end());
        ll sol=0;
        for (int x:v) sol+=abs(v[n/2]-x);
        return sol;
    }
    else if (casobinario(x)){
        vvi unos(n);
        vvi ceros(n);
        for (int i=0;i<n;i++){
            for (int j=0;j<m;j++){
                if (x[i][j]) unos[i].push_back(j);
                else ceros[i].push_back(j);
            }
        }
        set<pii> cantidad;
        for (int i=0;i<n;i++) cantidad.insert(pii{unos[i].size(),i});
        vvi res(n,vi(m,-1));
        vvi cadadia(k);
        for (int dia=0;dia<k;dia++){
            auto a=cantidad.begin();
            vii restar;
            for (int i=0;i<n/2;i++){
                int ac=(*a).second;
                if (ceros[ac].size()){
                    res[ac][ceros[ac][ceros[ac].size()-1]]=dia;
                    ceros[ac].pop_back();
                    cadadia[dia].push_back(0);
                }
                else{
                    res[ac][unos[ac][unos[ac].size()-1]]=dia;
                    unos[ac].pop_back();
                    restar.push_back((*a));
                    cadadia[dia].push_back(1);
                }
                a++;
            }
            for (int i=0;i<n/2;i++){
                int ac=(*a).second;
                if (unos[ac].size()){
                    res[ac][unos[ac][unos[ac].size()-1]]=dia;
                    unos[ac].pop_back();
                    restar.push_back((*a));
                    cadadia[dia].push_back(1);
                }
                else{
                    res[ac][ceros[ac][ceros[ac].size()-1]]=dia;
                    ceros[ac].pop_back();
                    cadadia[dia].push_back(0);
                }
                a++;
            }
            for (pii x:restar){
                cantidad.erase(x);
                cantidad.insert(pii{x.first-1,x.second});
            }
        }
        allocate_tickets(res);
        
        ll sol=0;
        for (vi v:cadadia){
            sort(v.begin(),v.end());
            for (int x:v) sol+=abs(v[n/2]-x);
        }
        return sol;
    }
	else if (k==1){
        vii indice(n);
        for (int i=0;i<n;i++) indice[i]=pii{minind(x[i]),maxind(x[i])};
        viii v(n);
        for (int i=0;i<n;i++) v[i]=piii{pii{x[i][indice[i].first],x[i][indice[i].second]},i};
        sort(v.begin(),v.end(),orden);
        ll sol=-1;
        vi mejorizq;
        vi mejorder;
        for (int i=0;i<n;i++){
            vi izq;
            vi der;
            int j=0;
            while (izq.size()<n/2-1 and v[j].se!=i){
                if (v[j].fi.fi<=x[i][indice[i].fi]) izq.push_back(v[j].se);
                else der.push_back(v[j].se);
                j++;
            }
            izq.push_back(v[j].se);
            j++;
            while (j<n){
                der.push_back(v[j].se);
                j++;
            }
            if (izq.size()<n/2) continue;
            ll suma=0;
            int median=x[i][indice[i].fi];
            for (int num:izq) suma+=median-x[num][indice[num].fi];
            for (int num:der) suma+=x[num][indice[num].se]-median;
            if (suma>sol){
                sol=suma;
                mejorizq=izq;
                mejorder=der;
            }
        }
        vvi res(n,vi(m,-1));
        for (int num:mejorizq) res[num][indice[num].fi]=0;
        for (int num:mejorder) res[num][indice[num].se]=0;
        allocate_tickets(res);
        return sol;
    }
    return 1;
}

Compilation message (stderr)

tickets.cpp: In function 'int minind(vi)':
tickets.cpp:28:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for (int i=0;i<v.size();i++){
      |                  ~^~~~~~~~~
tickets.cpp: In function 'int maxind(vi)':
tickets.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for (int i=0;i<v.size();i++){
      |                  ~^~~~~~~~~
tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:129:30: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  129 |             while (izq.size()<n/2-1 and v[j].se!=i){
      |                    ~~~~~~~~~~^~~~~~
tickets.cpp:140:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  140 |             if (izq.size()<n/2) continue;
      |                 ~~~~~~~~~~^~~~

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