Submission #303728

#	Time	Username	Problem	Language	Result	Execution time	Memory
303728		ludo	Packing Biscuits (IOI20_biscuits)	C++14	21 / 100	1093 ms	36984 KiB

biscuits

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

typedef long long ll;

map< pair<int,ll>, ll> dp;
ll rec(ll x, const vector<ll> &a, int idx, ll extra) {
	if (idx >= a.size())
		return extra/x + 1;

	if (dp.find( pair<int,ll>(idx, extra) ) != dp.end())
		return dp[ pair<int,ll>(idx, extra) ];

	ll avail = extra + a[idx];
	return dp[ pair<int,ll>(idx, extra) ] =
		(avail >= x ? rec(x, a, idx+1, (avail-x)/2) : 0)
		+ rec(x, a, idx+1, avail/2);
}

ll count_tastiness(ll x, vector<ll> a) {
	dp.clear();
	return rec(x, a, 0, 0);
}

Compilation message (stderr)

biscuits.cpp: In function 'll rec(ll, const std::vector<long long int>&, int, ll)':
biscuits.cpp:9:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |  if (idx >= a.size())
      |      ~~~~^~~~~~~~~~~

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