Submission #863719

#	Time	Username	Problem	Language	Result	Execution time	Memory
863719		JakobZorz	카니발 티켓 (IOI20_tickets)	C++14	27 / 100	416 ms	86680 KiB

tickets

#include"tickets.h"
#include<vector>
#include<algorithm>
using namespace std;
typedef long long ll;

ll find_maximum(int k,vector<vector<int>>x){
	ll n=x.size();
	ll m=x[0].size();
	vector<vector<int>>answer(n,vector<int>(m,-1));
    vector<vector<pair<ll,ll>>>arr(n,vector<pair<ll,ll>>(m));
    ll sum=0;
    vector<pair<ll,ll>>q;
    vector<ll>numplus(n,0);
    for(ll i=0;i<n;i++){
        for(ll j=0;j<m;j++){
            arr[i][j]={x[i][j],j};
        }
        sort(arr[i].begin(),arr[i].end());
        for(ll j=0;j<k;j++){
            sum-=arr[i][j].first;
            q.emplace_back(arr[i][j].first+arr[i][m-k+j].first,i);
        }
    }
    sort(q.begin(),q.end());
    reverse(q.begin(),q.end());
    
    for(ll i=0;i<n*k/2;i++){
        sum+=q[i].first;
        numplus[q[i].second]++;
    }
    vector<ll>numtaken1(n,0);
    vector<ll>numtaken2(n,0);
    
    for(int round=0;round<k;round++){
        int num_down=0;
        for(ll i=0;i<n;i++){
            if(num_down==n/2||numtaken1[i]==k-numplus[i]){
                numtaken2[i]++;
                answer[i][m-numtaken2[i]]=round;
            }else{
                answer[i][numtaken1[i]]=round;
                numtaken1[i]++;
                num_down++;
            }
        }
    }
    
	allocate_tickets(answer);
	return sum;
}

• 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