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Submission #742092

# Submission time Handle Problem Language Result Execution time Memory
742092 2023-05-15T15:20:08 Z bogdanvladmihai Rack (eJOI19_rack) C++14
100 / 100
 6 ms 4008 KB 
#include <iostream>
#include <vector>

const int M = 1e9 + 7;

int main() {
    int N;
    int64_t K;
    std::cin >> N >> K;
    K--;
    std::vector<int> pow(N + 1, 1);
    for (size_t i = 1; i < pow.size(); i++) {
        pow[i] = pow[i - 1] + pow[i - 1];
        if (pow[i] >= M) {
            pow[i] -= M;
        }
    }
    int answer = 1;
    for (int i = 0; i < 63; i++) {
        if ((K & (1LL << (int64_t)i)) > 0) {
            answer += pow[N - i - 1];
            if (answer >= M) {
                answer -= M;
            }
        }
    }
    std::cout << answer << "\n";
    return 0;
}

Subtask #1
20.0 / 20.0

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

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 428 KB Output is correct
15 Correct 6 ms 4008 KB Output is correct