Submission #1022319

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022319		3mara	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	870 ms	174144 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;

long long find_maximum(int k, vector<vector<int>> v) {
	int n = v.size();
	int m = v[0].size();
	vector<vector<int>> ans;
	multiset<int> st[n];
	vector<int> sm[n],bg[n];
	priority_queue<pair<int,int>> q;
	for(int i=0;i<n;i++){
		vector<int> row(m);
		for(int j=0;j<m;j++){
			row[j]=-1;
			st[i].insert(v[i][j]);
		}
		int j=0;
		for(auto it=st[i].begin();j<k;j++,it++){
			sm[i].push_back(*it);
		}
		q.push({(*st[i].rbegin())+sm[i].back(),i});
		ans.push_back(row);
	}
	for(int t=0;t<k*n/2;t++){
		int i=q.top().second; q.pop();
		sm[i].pop_back(); bg[i].push_back(*st[i].rbegin());
		st[i].erase(prev(st[i].end()));
		if(!sm[i].size()) continue;
		q.push({(*st[i].rbegin())+sm[i].back(),i});
	}
	int arr[k]={}; map<int,int> mp;
	int vis[n][k+5]={};
	long long sum=0; int fill=0;
	for(int i=0;i<n;i++){
		int idx=fill,temp=fill;
		for(auto x:sm[i]){
			sum-=x; mp[x]++;
			arr[idx]++;
			if(arr[idx]==n/2) fill=idx+1;
			idx++;
		}
		idx=temp;
		for(int j=0;j<m;j++){
			if(mp[v[i][j]]==0) continue;
			vis[i][idx]++;
			mp[v[i][j]]--; ans[i][j]=idx;
			idx++;
		}
		mp.clear();
	}
	for(int i=0;i<k;i++) arr[i]=0;
	for(int i=0;i<n;i++){
		int idx=0;
		for(auto x:bg[i]){
			while(vis[i][idx]||arr[idx]==n/2) idx++;
			sum+=x; mp[x]++;
			idx++;
		}
		idx=0;
		for(int j=0;j<m;j++){
			while(vis[i][idx]||arr[idx]==n/2) idx++;
			if(mp[v[i][j]]==0||ans[i][j]!=-1) continue;
			arr[idx]++;
			mp[v[i][j]]--; ans[i][j]=idx;
			idx++;
		}
		mp.clear();
	}
	allocate_tickets(ans);
	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