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Submission #532288

# Submission time Handle Problem Language Result Execution time Memory
532288 2022-03-02T16:51:17 Z DariaR Rack (eJOI19_rack) C++17
100 / 100
 10 ms 308 KB 
#include <bits/stdc++.h>
using namespace std; 

const int MOD = 1e9 + 7;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    long long n, k;
    long long v = 1;
    long long base = 1;
    cin >> n >> k;
    k--; 

    for (int i = 1; i <= n; i++) {
        if (k % 2 == 0) {
            v = ((long long)v * 2) % MOD;
        } else {
            v = ((long long)v * 2 + 1) % MOD;
        }
        k /= 2;
    }
    
    for (int i = 1; i <= n; i++) {
        base = ((long long)base * 2) % MOD;
    }

    cout << (v - (base - 1) + MOD) % MOD << "\n";
    
	return 0;
}

Subtask #1
20.0 / 20.0

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

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 10 ms 204 KB Output is correct