Submission #1207896

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207896		simona1230	Packing Biscuits (IOI20_biscuits)	C++20	100 / 100	927 ms	5656 KiB

biscuits

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

long long p[64];
long long ans,nd,b[64];
long long s[64];
vector<long long> v;
long long dp[64][10001];
map<long long,long long> mp,in;

long long compute(long long i)
{
    if(i==0)return 1;
    if(i<0)return 0;

    if(!in[i])
    {
        int j=0;
        while(j<59&&p[j+1]<=i)j++;
        long long y=i-p[j];
        mp[i]=compute(p[j]-1)+compute(min(y,s[j]/nd-p[j]));
        in[i]=1;
    }
    //cout<<i<<" "<<mp[i]<<endl;

    return mp[i];
}

long long count_tastiness(long long x, std::vector<long long> a)
{
    mp.clear();
    in.clear();
    p[0]=1;
    for(int i=1; i<60; i++)
        p[i]=p[i-1]*2;
    vector<long long> h=a;

    while(a.size()<60)a.push_back(0);
    if(x<=10000)
    {
        for(int i=0; i<a.size(); i++)
        {
            if(a[i]>=x)
            {
                long long lf=a[i]-x;
                a[i]=x+lf%2;
                a[i+1]+=lf/2;
            }
        }

        dp[60][0]=1;
        for(int i=59; i>=0; i--)
        {
            //cout<<a[i]<<" ";
            for(int j=0; j<=10000; j++)
            {
                dp[i][j]=0;
                if((j+a[i])/2<=10000)dp[i][j]=dp[i+1][(j+a[i])/2];
                if(j+a[i]>=x&&(j+a[i]-x)/2<=10000)dp[i][j]+=dp[i+1][(j+a[i]-x)/2];
                //cout<<i<<" "<<j<<" "<<dp[i][j]<<endl;
            }
        }
        //cout<<endl;

        //return dp[0][0];
        //cout<<dp[0][0]<<endl;
    }
    nd=x;
    s[0]=a[0];
    for(int i=1; i<60; i++)
        s[i]=s[i-1]+a[i]*p[i];
    //cout<<"out"<<endl;

    return compute(s[59]);
    ans=0;
    v.clear();
    v.push_back(0);
    for(int i=0; i<60; i++)
    {
        int sz=v.size();
        int j=0;
        while(j<sz&&(v[j]+p[i])<=s[i]/nd)
        {
            v.push_back(v[j]+p[i]);
            j++;
        }
    }
    /*cout<<"? "<<v.size()<<endl;
    if(v.size()!=dp[0][0])
    {
        cout<<x<<endl;
        for(int i=0;i<a.size();i++)
            cout<<a[i]<<" ";
        cout<<endl;
        exit(0);
    }*/
    return v.size();
}
/*
vector<long long> c(10);
void gen()
{
    int k=5;
    int x=rand()%5+2;
    for(int i=0; i<k; i++)
        c[i]=rand()%100;
    cout<<count_tastiness(x,c)<<endl;
}

int main()
{
    while(1)
    {
        gen();
    }
}
*/

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