Submission #1171094

#	Time	Username	Problem	Language	Result	Execution time	Memory
1171094		vicvic	Bootfall (IZhO17_bootfall)	C++20	100 / 100	353 ms	2860 KiB

bootfall

#include <iostream>
#include <vector>

using namespace std;
int n, dp[250005], v[505], rez[250005], s;
void add (int val)
{
    for (int i=s;i>=val;i--)
    {
        dp[i]+=dp[i-val];
    }
}
void remove (int val)
{
    for (int i=val;i<=s;i++)
    {
        dp[i]-=dp[i-val];
    }
}
int main ()
{
    ios :: sync_with_stdio (0);
    cin.tie (nullptr);
    cin >> n;
    dp[0]=1;
    for (int i=1;i<=n;i++)
    {
        cin >> v[i];
        s+=v[i];
    }
    int cnt=0;
    for (int i=1;i<=s;i++)
    {
        if (rez[i]==n)
        {
            cnt++;
        }
    }
    for (int i=1;i<=n;i++)
    {
        add (v[i]);
    }
    if (s%2!=0 || dp[s/2]==0)
    {
        cout << 0;
        return 0;
    }
    for (int i=1;i<=n;i++)
    {
        int s1=s-v[i];
        remove (v[i]);
        for (int j=0;j<=s1;j++)
        {
            if (!dp[j])
                continue;
            rez[max (0, s1-j-j)]++;
        }
        add (v[i]);
    }
    for (int i=1;i<=s;i++)
    {
        if (rez[i]==n)
        {
            cnt++;
        }
    }
    cout << cnt << "\n";
    for (int i=1;i<=s;i++)
    {
        if (rez[i]==n)
        {
            cout << i << " ";
        }
    }
    return 0;
}

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