Submission #441107

#	Time	Username	Problem	Language	Result	Execution time	Memory
441107		roseanne_pcy	Carnival Tickets (IOI20_tickets)	C++14	14 / 100	571 ms	57772 KiB

tickets

#include "tickets.h"
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> ii;
typedef vector<int> vi;
typedef long long ll;

#define f first
#define s second
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rsz resize

const int md = 1e9+7;
const ll inf = 1e18;
const int maxn = 2e3+5;

template<class T> void ckmin(T &a, T b) { a = min(a, b); }
template<class T> void ckmax(T &a, T b) { a = max(a, b); }

int zeros[maxn], ones[maxn];
int p0[maxn], p1[maxn];
int n, m;

bool cmp(int x, int y)
{
	return zeros[x]> zeros[y];
}

long long find_maximum(int k, vector< vector<int> > x) 
{
	n = x.size(); m = x[0].size();
	for(int i = 0; i< n; i++)
	{
		for(int j = 0; j< m; j++)
		{
			zeros[i] += (x[i][j] == 0);
			ones[i] += (x[i][j] == 1);
		}
		p1[i] = zeros[i];
	}

	vector< vector<int> > res(n, vector<int>(m, -1));

	vector<int> all_nums;
	for(int i = 0; i< n; i++) all_nums.pb(i);
	
	ll sum = 0;

	for(int r = 0; r< k; r++)
	{
		sort(all(all_nums), cmp);
		int minus = 0, plus = 0;
		for(int i = 0; i< n/2; i++)
		{
			int x = all_nums[i];
			if(zeros[x]> 0)
			{
				zeros[x]--;
				res[x][p0[x]++] = r;
			}
			else
			{
				ones[x]--;
				minus++;
				res[x][p1[x]++] = r;
			}
		}
		for(int i = n/2; i< n; i++)
		{
			int x = all_nums[i];
			if(ones[x]> 0)
			{
				ones[x]--;
				plus++;
				res[x][p1[x]++] = r;
			}
			else
			{
				zeros[x]--;
				res[x][p0[x]++] = r;
			}
		}
		sum += plus-minus;
	}
	allocate_tickets(res);
	return sum;
}

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