Submission #598059

#	Time	Username	Problem	Language	Result	Execution time	Memory
598059		Summers	Bootfall (IZhO17_bootfall)	C++14	100 / 100	339 ms	4836 KiB

bootfall

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
long long a[1000000], s[1000000]={1}, ans[250001];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    long long i,j,n,last=0,br=0;

    cin>>n;

    for(i=1;i<=n;i++)
    {
        cin>>a[i];
        for(j=last;j>=0;j--)
        {
            if(s[j])s[j+a[i]]+=s[j];
        }
        last+=a[i];
    }

    if(s[last/2]==0 || last%2!=0){cout<<0<<endl;return 0;}

    for(i=1;i<=n;i++)
    {
        last-=a[i];
        for(j=0;j<=last;j++)
        {
            if(s[j])s[j+a[i]]-=s[j];
        }

        for(j=1;j<=250000;j++)
        {
            if((last+j)%2!=0 || s[(last+j)/2]==0)
            {
                if(ans[j]==0)br++;
                ans[j]=1;
            }
        }
        for(j=last;j>=0;j--)
        {
            if(s[j])s[j+a[i]]+=s[j];
        }
        last+=a[i];

    }
    cout<<250000-br<<endl;

    for(i=1;i<=250000;i++)
    {
        if(ans[i]==0)cout<<i<<" ";
    }
    cout<<endl;

}

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 21 / 21
• Subtask 6: 35 / 35