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Submission #624618

# Submission time Handle Problem Language Result Execution time Memory
624618 2022-08-08T14:47:38 Z Blagoj Rack (eJOI19_rack) C++14
40 / 100
 2 ms 2492 KB 
#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long int ull;
typedef long long int ll;
typedef long double ld;
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios::sync_with_stdio(0);
    ull n, k, mod = 1000000007;
    cin >> n >> k;
    vector<ull> v = {1, (ull)((1 << (n - 1)) + 1) % mod};
    ull sum = (1 << (n - 2)) % mod;
    if (k == 1)
    {
        cout << 1;
        return 0;
    }
    if (k == 2)
    {
        cout << v[1];
        return 0;
    }
    while (sum > 0)
    {
        ull sz = v.size();
        for (ull i = 0; i < sz; i++)
        {
            if ((i + 1) + sz == k)
            {
                cout << (ull)(v[i] + sum) % mod;
                return 0;
            }
            if (sum > 1)
            {
                v.push_back((v[i] + sum) % mod);
            }
        }
        sum /= 2;
    }
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 2 ms 1472 KB Output is correct
10 Correct 2 ms 2492 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 2 ms 1472 KB Output is correct
10 Correct 2 ms 2492 KB Output is correct
11 Incorrect 0 ms 212 KB Output isn't correct
12 Halted 0 ms 0 KB -