Submission #590577

#	Time	Username	Problem	Language	Result	Execution time	Memory
590577		ogibogi2004	Packing Biscuits (IOI20_biscuits)	C++14	100 / 100	38 ms	1328 KiB

biscuits

#include "biscuits.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
unordered_map<ll,ll>dp;
ll s[64];
ll xx;
ll calc(ll n)
{
    if(n<=0)return 0;
    if(n==1)return 1;
    if(dp.count(n))return dp[n];
    ll t=0,pw2=1;
    while(pw2<n){pw2*=2ll;t++;}
    pw2/=2ll;t--;
    return dp[n]=calc(pw2)+calc(min(n,1ll+s[t]/xx)-pw2);
}
long long count_tastiness(long long x, vector<long long> a) {
    dp.clear();
    s[0]=a[0];xx=x;
    for(ll i=1;i<a.size();i++)
    {
        s[i]=s[i-1]+a[i]*(1ll<<i);
    }
    for(ll i=a.size();i<=62;i++)s[i]=s[i-1];
    for(ll i=0;i<=62;i++)
    {
        calc((1ll<<i));
    }
    return dp[(1ll<<62)];
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:21:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(ll i=1;i<a.size();i++)
      |                ~^~~~~~~~~

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