Submission #1015864

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015864		Ahmed_Solyman	Carnival Tickets (IOI20_tickets)	C++14	25 / 100	678 ms	85100 KiB

tickets

/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
#define endl '\n'
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
    return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
void allocate_tickets(vector<vector<int>>s);
 
ll find_maximum(int k,vector<vector<int>>v){
    int n=(int)v.size();
    int m=(int)v[0].size();
    vector<vector<int>>g(n,vector<int>(m,0));
    vector<array<int,3>>p;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            p.push_back({v[i][j],i,j});
        }
    }
    sort(allr(p));
    ll ret=0;
    vector<int>cnt(n);
    vector<int>v1[n],v2[n];
    for(int i=0;i<n*m;i++){
        if(i<n*m/2)ret+=p[i][0],cnt[p[i][1]]++,v1[p[i][1]].push_back(p[i][2]);
        else ret-=p[i][0],v2[p[i][1]].push_back(p[i][2]);
    }
    int r=0;
    while(m--){
        vector<pair<int,int>>d;
        for(int i=0;i<n;i++)d.push_back({cnt[i],i});
        sort(allr(d));
        for(int i=0;i<n;i++){
            int j=d[i].second;
            if(i<n/2){
                g[j][v1[j].back()]=r;
                v1[j].pop_back();
                cnt[j]--;
            }
            else{
                g[j][v2[j].back()]=r;
                v2[j].pop_back();
            }
        }
        r++;
    }
    allocate_tickets(g);
    return ret;
}

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