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Submission #607278

# Submission time Handle Problem Language Result Execution time Memory
607278 2022-07-26T14:22:39 Z xtk Rack (eJOI19_rack) C++17
100 / 100
 10 ms 320 KB 
#include <bits/stdc++.h>
using namespace std;

const int MOD = 1e9 + 7;

int main()
{
	ios_base::sync_with_stdio(0), cin.tie(0);

	int n;
	long long k;
	cin >> n >> k;
	--k;

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

	int pow2 = 1;
	for (int i = 1; i <= n; ++i)
		pow2 = ((long long)2*pow2) % MOD;

	cout << (wynik - (pow2 - 1) + MOD) % MOD << '\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 0 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 0 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 0 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 0 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 0 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 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 10 ms 320 KB Output is correct