Submission #476754

#	Time	Username	Problem	Language	Result	Execution time	Memory
476754		SamAnd	Sequence (BOI14_sequence)	C++17	25 / 100	146 ms	1692 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const ll INF = 1000000009000000009;

int emp;
ll rec(vector<int> v)
{
    while (!v.empty() && v.back() == 0)
        v.pop_back();

    if (v.empty())
        return emp;
    if (sz(v) == 1)
    {
        ll ans = 0;
        if (!(v[0] & 1))
        {
            for (int i = 0; i < 10; ++i)
            {
                if ((v[0] & (1 << i)))
                    ans = (ans * 10 + i);
            }
        }
        else
        {
            bool z = false;
            for (int i = 1; i < 10; ++i)
            {
                if ((v[0] & (1 << i)))
                {
                    ans = (ans * 10 + i);
                    if (!z)
                    {
                        z = true;
                        ans = (ans * 10);
                    }
                }
            }
            if (!z)
                ans = 10;
        }
        return ans;
    }

    ll ans = INF;
    for (int s = 0; s < 10; ++s)
    {
        int x = s;
        vector<int> u = v;
        vector<int> nv;
        int j = 0;
        for (int i = 0; i < sz(u); ++i)
        {
            u[i] = (u[i] & (((1 << 10) - 1) ^ (1 << x)));
            if (x == 9)
            {
                int y = 0;
                while (j <= i)
                    y |= u[j++];
                nv.push_back(y);
            }
            x = (x + 1) % 10;
        }
        {
            int y = 0;
            while (j < sz(u))
                y |= u[j++];
            if (y)
                nv.push_back(y);
        }

        if (sz(v) == 2 && sz(nv) == 2 && v[0] == nv[0] && v[1] == nv[1])
            continue;
        ans = min(ans, rec(nv) * 10 + s);
    }

    return ans;
}

void solv()
{
    int n;
    cin >> n;
    vector<int> v;
    while (n--)
    {
        int x;
        cin >> x;
        v.push_back((1 << x));
    }

    ll ans = rec(v);
    if (!ans)
    {
        emp = 1;
        ans = rec(v);
    }
    cout << ans << "\n";
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    ios_base::sync_with_stdio(false), cin.tie(0);

    int tt = 1;
    //cin >> tt;
    while (tt--)
        solv();
    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 33
• Subtask 3: 25 / 25
• Subtask 4: 0 / 33