Submission #301600

#	Time	Username	Problem	Language	Result	Execution time	Memory
301600		qiangbao	Carnival Tickets (IOI20_tickets)	C++14	27 / 100	768 ms	60316 KiB

tickets

#include <iostream>
#include <algorithm>
#include <vector>
#include "tickets.h"

#define pb push_back

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, pii> piii;

int n, m, kk;
vector<vector<int> > a;
int beg[1501], endi[1501];

vector<pii> subt;
vector<piii> pos;
bool used[3000001];
bool usedc[1501];

ll ansval=0;
vector<int> plamt;
vector<vector<int> > ans;

ll find_maximum(int kkk, vector<vector<int> > x)
{
    int i, j;
    
    n=x.size(), m=x[1].size(), kk=kkk;
    a=x;
    for(i=0;i<m;i++)
        plamt.pb(-1);
    for(i=0;i<n;i++)
        ans.pb(plamt);
    for(i=0;i<n;i++)
        endi[i]=m-1;
    
    for(i=0;i<n;i++){
        for(j=0;j<kk;j++){
            ansval+=a[i][endi[i]];
            subt.pb({a[i][endi[i]]+a[i][kk-j-1], i});
            endi[i]--;
        }
    }
    sort(subt.begin(), subt.end());
    for(i=0;i<n*kk/2;i++){
        pii f=subt[i];
        ansval-=f.first;
        beg[f.second]++, endi[f.second]++;
    }
    
    for(i=0;i<n;i++){
        for(j=0;j<beg[i];j++)
            pos.pb({a[i][j], {i, j}});
        for(j=endi[i]+1;j<m;j++)
            pos.pb({a[i][j], {i, j}});
    }
    sort(pos.begin(), pos.end());
    for(i=0;i<kk;i++){
        int cnt=0, cnt2=0;
        for(j=0;j<n;j++)
            usedc[j]=false;
        j=0;
        while(cnt<n/2){
            if(!used[j] && !usedc[pos[j].second.first]){
                ans[pos[j].second.first][pos[j].second.second]=i;
                cnt++, used[j]++, usedc[pos[j].second.first]=true;
            }
            j++;
        }
        j=n*kk-1;
        while(cnt2<n/2){
            if(!used[j] && !usedc[pos[j].second.first]){
                ans[pos[j].second.first][pos[j].second.second]=i;
                cnt2++, used[j]++, usedc[pos[j].second.first]=true;
            }
            j--;
        }
    }
    
    allocate_tickets(ans);
    return ansval;
}

//int main()
//{
//    find_maximum(2, {{0, 2, 5},{1, 1, 3}});
//    find_maximum(1, {{5, 9}, {1, 4}, {3, 6}, {2, 7}});
//    find_maximum(3, {{0, 1, 1, 1, 1, 1}, {0, 0, 0, 1, 1, 1}, {0, 1, 1, 1, 1, 1}, {0, 1, 1, 1, 1, 1}});
//}

Compilation message (stderr)

tickets.cpp: In function 'll find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:69:31: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated]
   69 |                 cnt++, used[j]++, usedc[pos[j].second.first]=true;
      |                               ^~
tickets.cpp:77:32: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated]
   77 |                 cnt2++, used[j]++, usedc[pos[j].second.first]=true;
      |                                ^~

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