Submission #305016

#	Time	Username	Problem	Language	Result	Execution time	Memory
305016		arnold518	Packing Biscuits (IOI20_biscuits)	C++14	100 / 100	35 ms	1024 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
ll X, A[100], P[100];

ll dp[100][100];

ll solve(int bit, int con)
{
	if(bit==-1) return 1;

	ll &ret=dp[bit][con];
	if(ret!=-1) return ret;

	ll t=P[con]&((1ll<<(bit+1))-1);
	if(t>P[bit]) t=P[bit], con=bit;

	ret=0;
	if((1ll<<bit)>t)
	{
		ret+=solve(bit-1, con);
	}
	else
	{
		ret+=solve(bit-1, bit-1)+solve(bit-1, con);
	}


	//printf("%d %d : %lld\n", bit, con, ret);
	return ret;
}

ll count_tastiness(ll _X, vector<ll> _A)
{
	X=_X;
	memset(A, 0, sizeof(A));
	for(int i=0; i<_A.size(); i++) A[i]=_A[i];
 
	for(int i=0; i<60; i++) P[i]=(1ll<<i)*A[i];
	for(int i=1; i<60; i++) P[i]+=P[i-1];
	for(int i=0; i<60; i++) P[i]/=X;
	for(int i=0; i<60; i++) P[i]=min(P[i], (1ll<<(i+1))-1);

	//for(int i=0; i<60; i++) printf("%d ", P[i]); printf("\n");
 	
 	memset(dp, -1, sizeof(dp));
 	return solve(59, 59);
}

Compilation message (stderr)

biscuits.cpp: In function 'll count_tastiness(ll, std::vector<long long int>)':
biscuits.cpp:42:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |  for(int i=0; i<_A.size(); i++) A[i]=_A[i];
      |               ~^~~~~~~~~~

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