Submission #476793

#	Time	Username	Problem	Language	Result	Execution time	Memory
476793		SamAnd	Sequence (BOI14_sequence)	C++17	100 / 100	520 ms	1884 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;

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

    if (v.empty())
        return 0;
    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;

        ll yans = rec(nv);
        if (s == 0 && yans == 0)
            yans = 1;
        ans = min(ans, yans * 10 + s);
    }

    {
        int s = 0;
        int x = s;
        vector<int> u = v;
        vector<int> nv;
        int j = 0;
        for (int i = 0; i < sz(u); ++i)
        {
            if (i > 0)
                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]))
        {
            ll yans = rec(nv);
            ans = min(ans, yans * 10 + s);
        }
    }

    return ans;
}

bool stg(ll ans, vector<int> v)
{
    bool z = true;
    int x = ans;
    for (int i = 0; i < sz(v); ++i)
    {
        bool zz = false;
        int y = x;
        while (y)
        {
            if ((1 << y % 10) == v[i])
            {
                zz = true;
                break;
            }
            y /= 10;
        }
        if (!zz)
        {
            z = false;
            break;
        }
        ++x;
    }
    return z;
}

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)
    {
        ans = 1;
        while (1)
        {
            if (stg(ans, v))
                break;
            ans *= 10;
        }
    }
    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);

    /*for (int l = 1; l <= 1000; ++l)
    {
        for (int r = l; r <= l + 20; ++r)
        {
            vector<int> v;
            for (int i = l; i <= r; ++i)
            {
                int x = i;
                vector<int> vx;
                while (x)
                {
                    vx.push_back(x % 10);
                    x /= 10;
                }
                v.push_back((1 << vx[rnf() % sz(vx)]));
            }
            ll ans = rec(v);
            if (!ans)
            {
                ans = 1;
                while (1)
                {
                    if (stg(ans, v))
                        break;
                    ans *= 10;
                }
            }

            if (ans > l)
            {
                cout << "WA0\n";
                cout << l << ' ' << r << "\n";
                cout << ans << "\n";
                rec(v);
                return 0;
            }
            else if (!stg(ans, v))
            {
                cout << "WA1\n";
                cout << l << ' ' << r << "\n";
                cout << ans << "\n";
                rec(v);
                return 0;
            }
        }
    }
    cout << "OK\n";
    return 0;*/

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

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