Submission #440383

#	Time	Username	Problem	Language	Result	Execution time	Memory
440383		stoyan_malinin	Rack (eJOI19_rack)	C++14	40 / 100	1 ms	296 KiB

rack

#include <iostream>
#include <vector>
#include <queue>
#include <set>

using namespace std;

const long long mod = 1e9 + 7;

long long revBits(long long x, int bitCnt)
{
    long long res = 0;
    for(int bit = 0;bit<bitCnt;bit++)
    {
        res += (((x>>bit)&1)<<(bitCnt-bit-1));
    }

    return res;
}

int main()
{
    long long n, k;
    cin >> n >> k;

    cout << (revBits(k-1, n) + 1)%mod << '\n';
}
/*
5 3
5 0 1 2 5
5 2 3
4 2 3
1 4 5

3 1
2 2 1
1 2 3
*/

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 60