Submission #1019231

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019231		j_vdd16	Packing Biscuits (IOI20_biscuits)	C++17	9 / 100	1073 ms	1070912 KiB

biscuits

#include <algorithm>
#include <bitset>
#include <cstdint>
#include <cstring>
#include <iostream>
#include <limits.h>
#include <math.h>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

#define int long long
#define ll long long
#define loop(X, N) for(int X = 0; X < (N); X++)
#define all(V) V.begin(), V.end()
#define rall(V) V.rbegin(), V.rend()

using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;


int count_tastiness(int x, vi a)
{
	constexpr int N = 61;
	while (a.size() < N)
		a.push_back(0);

	vi pref(N, 0);
	pref[0] = a[0];
	for (int i = 1; i < N; i++)
		pref[i] = pref[i - 1] / 2 + a[i];

	int sum = 0;
	loop(i, N)
		sum += a[i] * (1LL << i);

	int result = sum + 1;

	vi sub(sum + 1, 0);
	vb isValid(sum + 1, true);
	for (int bit = N - 1; bit >= 0; bit--)
	{
		for (int y = 0; y <= sum; y++)
		{
			if (!isValid[y])
				continue;

			sub[y] *= 2;
			int count = pref[bit] - sub[y];

			if ((y & (1LL << bit)) == 0)
			{
				sub[y] = max(0LL, sub[y] - a[bit]);
				continue;
			}

			if (count < x)
			{
				result--;
				isValid[y] = false;
				continue;
			}

			sub[y] += x;
			sub[y] = max(0LL, sub[y] - a[bit]);
		}
	}

	return result;
}

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