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Submission #466176

# Submission time Handle Problem Language Result Execution time Memory
466176 2021-08-18T09:45:41 Z MKutayBozkurt Rack (eJOI19_rack) C++14
100 / 100
 59 ms 91724 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <bits/stdc++.h>
using namespace std;

#define int long long
const int mod = 1e9 + 7;

int32_t main() {
  ios::sync_with_stdio(0); cin.tie(0);
  function<int(int, int)> power = [&](int a, int b) {
    int ans = 1;
    while (b) {
      if (b & 1) ans = ans * a % mod;
      a = a * a % mod;
      b /= 2;
      ans %= mod;
    }
    return ans % mod;
  };
  function<int(int, int)> f = [&](int n, int k) {
    if (n == 0ll) return 1ll;
    if (k & 1) {
      return f(n - 1, (k + 1) / 2) % mod;
    } else {
      return f(n - 1, k / 2) + power(2, n - 1) % mod;
    }
  };
  int n, k; cin >> n >> k;
  cout << f(n, k) % mod << '\n';
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 716 KB Output is correct
14 Correct 3 ms 5580 KB Output is correct
15 Correct 59 ms 91724 KB Output is correct