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Submission #737096

# Submission time Handle Problem Language Result Execution time Memory
737096 2023-05-06T15:44:17 Z tshabanov7 Rack (eJOI19_rack) C++17
100 / 100
 4 ms 4064 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

constexpr int MOD = 1E9 + 7;

int add(int a, int b) {
    a += b;
    return a >= MOD ? a - MOD : a;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    ll k;
    cin >> k;
    k--;

    vector<int> pow2(n);
    pow2[0] = 1;
    for (int i = 0; i < n - 1; i++) {
        pow2[i + 1] = add(pow2[i], pow2[i]);
    }

    int ans = 0;
    while (k > 0) {
        ans = add(ans, (k % 2) * pow2[--n]);
        k /= 2;
    }

    cout << ans + 1 << "\n";

    return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 224 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 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 224 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 224 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 4 ms 4064 KB Output is correct