Submission #834659

#	Time	Username	Problem	Language	Result	Execution time	Memory
834659		Johann	Packing Biscuits (IOI20_biscuits)	C++14	9 / 100	1121 ms	1566712 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)
{
	X = _X;
	vector<__int128_t> S(sz(a) + 1, 0);
	__int128_t base = 1;
	for (int i = 0; i < sz(a); ++i)
	{
		S[i] += a[i] * base;
		S[i + 1] += S[i];
		base *= 2;
	}

	ll ans = 1;
	vector<__int128_t> A(1, 0);
	base = 1;
	for (int i = 0; base * X <= S.back(); ++i)
	{
		ll size = sz(A);
		__int128_t bound = (i < sz(S)) ? S[i] : S.back();
		for (int j = 0; j < size; ++j)
		{
			__int128_t y = A[j];
			if ((y + base) * X <= bound)
				A.push_back(y + base), ++ans;
		}
		base *= 2;
	}

	return ans;
}

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