Submission #1203831

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203831		nikolashami	Carnival Tickets (IOI20_tickets)	C++20	0 / 100	1 ms	328 KiB

tickets

#include<bits/stdc++.h>
using namespace std;
using ll=long long;

/*void allocate_tickets(vector<vector<ll>>a){
	ll n=a.size();
	for(int i=0;i<n;++i){
		for(auto&x:a[i])cout<<x<<' ';
		cout<<'\n';
	}
}*/

#include"tickets.h"

ll find_maximum(int k,vector<vector<int>>x){
	ll n=x.size(),m=x[0].size();
	vector<vector<int>>ret(n);
	for(int i=0;i<n;++i)ret[i].resize(m,-1);
	vector<array<ll,2>>isk(n);
	for(int i=0;i<n;++i)
		isk[i][0]=0,isk[i][1]=m-1;
	ll ans=0;
	for(int rnd=1;rnd<=k;++rnd){
		vector<ll>koji(n,0);
		priority_queue<array<ll,2>>pq;
		for(int i=0;i<n;++i)
			pq.push({x[i][isk[i][1]]-x[i][isk[i][0]],i});
		for(int z=0;z<n/2;++z){
			koji[pq.top()[1]]^=1;
			pq.pop();
		}
		for(int i=0;i<n;++i){
			if(koji[i]){
				ans+=x[i][isk[i][1]];
				ret[i][isk[i][1]--]=rnd-1;
			}
			else{
				ans-=x[i][isk[i][0]];
				ret[i][isk[i][0]++]=rnd-1;
			}
		}
	}
	allocate_tickets(ret);
	return ans;
}

/*signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    
    cout<<find_maximum(1,{{5,9},{1,4},{3,6},{2,7}});
}*/

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