Submission #1126598

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126598		Kerim	Sequence (BOI14_sequence)	C++20	100 / 100	151 ms	1348 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#define           f     first
#define           s     second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (ll)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())
 
const int N = 1e3 + 10;

ll cal(vector <int> v, int is) {
    if (sz(v) == 1) {
        ll ans = 0;
        for (int i = 1; i <= 9; i++) {
            if (v[0] & (1 << i)) {
                ans = ans * 10 + i;
                if (v[0] & 1) {
                    ans *= 10;
                    v[0] -= 1;
                }
            }
        }

        if (ans == 0 && (v[0] & 1)) {
            ans = 10;
        }

        return ans;
    } else {
        ll ans = 1e15;

        for (int dig = 0; dig <= 9 - is; dig++) {
            vector <int> nxt;
            int j = dig, mask = 0, zero = 0;
            for (int i = 0; i < sz(v); i++) {
                int cur = v[i];
                if (cur & (1 << j)) {
                    cur ^= (1 << j);
                }

                mask |= cur;
                if (v[i] & 1)
                    zero = 1;

                if (j == 9 || i + 1 == sz(v)) {
                    nxt.pb(mask);
                    mask = 0;
                }

                j = (j + 1) % 10;
            }

            ll tt = cal(nxt, sz(v) == 2 && dig == 9) * 10 + dig;
            if (tt == 0 && zero) {
                tt = 10;
            }

            ans = min(ans, tt);
        }

        return ans;
    }

    return -1;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin >> n;

    vector <int> v(n);

    for (auto &x : v) {
        cin >> x;
        x = (1 << x);
    }

    cout << cal(v, 0) << '\n';
    return 0;
}

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