Submission #303522

#	Time	Username	Problem	Language	Result	Execution time	Memory
303522		tutis	Packing Biscuits (IOI20_biscuits)	C++17	42 / 100	1065 ms	53600 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
typedef long long ll;
using namespace __gnu_pbds;
ll count_tastiness(ll x, vector<ll> a)
{
	while (a.size() < 60)
		a.push_back(0);
	ll s[61];
	for (int i = 0; i <= 60; i++)
		s[i] = 0;
	for (int t = 1; t <= 60; t++)
	{
		s[60 - t] = s[60 - t + 1] + a[60 - t];
		if (s[60 - t] >= x)
			s[60 - t] -= x;
		for (int i = 0; i < 60; i++)
		{
			s[i] *= 2;
			if (s[i] >= x)
				s[i] -= x;
		}
	}
	cc_hash_table<ll, ll>M[61];
	function<ll(ll, int)>get = [&](ll d, int i)->ll
	{
		if (i == 60)
			return d / x + 1;
		if (M[i].find(d) != M[i].end())
			return M[i][d];
		if (a[i] + d < x)
		{
			return M[i][d] = get((d + a[i]) / 2, i + 1);
		}
		else
		{
			return M[i][d] = get((d + a[i]) / 2, i + 1) + get((d + a[i] - x) / 2, i + 1);
		}
	};
	return get(0, 0);
}

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 21 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23