Submission #838499

#	Time	Username	Problem	Language	Result	Execution time	Memory
838499		caganyanmaz	Packing Biscuits (IOI20_biscuits)	C++17	0 / 100	1 ms	596 KiB

biscuits

#include <bits/stdc++.h>
#define pb push_back
#define ll long long
using namespace std;

//#define DEBUGGING
#ifdef DEBUGGING
#include "../debug.h"
#else
#define debug(x...) void(42)
#endif


constexpr static int MXK = 62;
ll count_tastiness(ll x, vector<ll> a) 
{
	assert(x == 1);
	int k = a.size();
	while (a.size() < MXK-1)
		a.pb(0);
	for (int i = 0; i < MXK; i++)
	{
		ll change = max<ll>((a[i] - x) / 2, 0);
		a[i+1] += change;
		a[i] -= change * 2;
	}
	vector<ll> pf(MXK, 0);
	pf[0] = 0;
	for (int i = 1; i < MXK; i++)
		pf[i] = pf[i-1]  + (a[i-1] << (i-1));
	vector<ll> dp(MXK, 0); // Last open bit
	dp[0] = 1;
	for (int i = 1; i < MXK; i++)
		for (int j = 0; j < i; j++)
			if ((pf[i] - pf[j]) >= (x<<(i-1)))
				dp[i] += dp[j];
	ll res = 0;
	for (int i = 0; i < MXK; i++)
		res += dp[i];
	debug(dp, res);
	return res;
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:18:6: warning: unused variable 'k' [-Wunused-variable]
   18 |  int k = a.size();
      |      ^

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