Submission #834619

#	Time	Username	Problem	Language	Result	Execution time	Memory
834619		Johann	Packing Biscuits (IOI20_biscuits)	C++14	33 / 100	1061 ms	1027740 KiB

biscuits

#include "biscuits.h"
#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

ll X;

long long count_tastiness(long long _X, std::vector<long long> a)
{
	vi b;
	X = _X;
	for (int i = 0; i < sz(a); ++i)
	{
		b.push_back(a[i]);

		if (b[i] >= X)
		{
			ll remove = ((a[i] - X) / 2) * 2;
			b[i] -= remove;
			if (i + 1 >= sz(a))
				a.push_back(0);
			a[i + 1] += remove / 2;
		}
	}

	if (b.back() != 0)
		b.push_back(0);
	vvi dp(sz(b), vi(X + 2, 0));
	// b.back() == 0
	for (int j = 0; j < sz(dp.back()); ++j)
		dp.back()[j] = 1;
	dp.back()[X] = 2;
	dp.back()[X + 1] = 2;

	for (int i = sz(b) - 2; i >= 0; --i)
	{
		for (int j = 0; j < sz(dp[i]); ++j)
		{
			ll vorrat = b[i] + j;
			dp[i][j] += dp[i + 1][vorrat / 2]; // mache nichts
			if (vorrat >= X)
				dp[i][j] += dp[i + 1][(vorrat - X) / 2]; // set a bit
		}
	}

	return dp[0][0];
}

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