Submission #596210

#	Time	Username	Problem	Language	Result	Execution time	Memory
596210		Red_Inside	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	3056 ms	56780 KiB

tickets

#include "tickets.h"

#include <bits/stdc++.h>

#define ll long long
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define o cout<<"BUG"<<endl;
#define FOR(i, j, n) for(int j = i; j < n; ++j)
#define forn(i, j, n) for(int j = i; j <= n; ++j)
#define nfor(i, j, n) for(int j = n; j >= i; --j)
#define all(v) v.begin(), v.end()
#define ld long double
#define ull unsigned long long

using namespace std;
const int maxn=1e6+10,LOG=17,mod=998244353;
int block = 226, timer = 0;
const ld EPS = 1e-18;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define IOS ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

#define bt(i) (1 << (i))
//#define int ll
const int inf=2e9;
#define y1 yy
#define prev pre
#define pii pair <int, int>

ll mni[maxn], mxi[maxn];
ll mx[maxn], mn[maxn];

bool cmp(pii a, pii b)
{
	return a.f > b.f;
}

long long find_maximum(int k, vector <vector <int> > a)
{
	vector <vector <int> > use, mark;
	int n = a.size();
	int m = a[0].size();
	use = a;
	forn(0, i, n-1) forn(0, j, m-1) use[i][j] = -1;
	ll ret = 0;
	forn(0, iter, k-1)
	{
		vector <pii> vec;
		forn(0, i, n-1)
		{
			mx[i] = -inf;
			mn[i] = inf;
			forn(0, j, m-1)
			{
				if(use[i][j] != -1) continue;
				if(mx[i] < a[i][j])
				{
					mx[i] = a[i][j];
					mxi[i] = j;
				}
				if(mn[i] > a[i][j])
				{
					mn[i] = a[i][j];
					mni[i] = j;
				}
			}
			vec.pb({mx[i]+mn[i], i});
		}
		sort(all(vec), cmp);
		FOR(0, i, n / 2)
		{
			use[vec[i].s][mxi[vec[i].s]] = iter;
			ret += mx[vec[i].s];
		}
		FOR(n / 2, i, n)
		{
			use[vec[i].s][mni[vec[i].s]] = iter;
			ret -= mn[vec[i].s];
		}
	}

	allocate_tickets(use);
	return ret;
}

• 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