Submission #370083

#	Time	Username	Problem	Language	Result	Execution time	Memory
370083		MilosMilutinovic	Packing Biscuits (IOI20_biscuits)	C++14	100 / 100	87 ms	1388 KiB

biscuits

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

#define ll long long
#define pb push_back

const int N=62;
ll x;
map<ll, ll> dp;
vector<ll> pref;

ll Solve(ll n) {
	if(n<=0)
		return (ll)0;
	if(n==1)
		return (ll)1;
	if(dp.find(n)!=dp.end())
		return dp[n];
	ll i=__lg(n-1);
	ll ans=Solve((ll)(1LL<<i))+Solve(min(n,pref[i]/x+1)-(ll)(1LL<<i));
	dp[n]=ans;
	return dp[n];
}

ll count_tastiness(ll X, vector<ll> a) {
	x=X;
	dp.clear();
	pref.clear();
	for(ll i=0; i<(int)a.size(); ++i) {
		if(i>0)
			a[i]=a[i-1]+a[i]*(ll)(1LL<<i);
		pref.pb(a[i]);
	}
	for(int i=(int)a.size(); i<61; ++i)
		pref.pb(pref.back());
	return Solve((ll)(1LL<<60));
}

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