Submission #581091

#	Time	Username	Problem	Language	Result	Execution time	Memory
581091		masmc05	Rack (eJOI19_rack)	C++17	40 / 100	1 ms	212 KiB

rack

/******************************************************************************

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#include <iostream>
#define int long long
using namespace std;
const long long mod=1e9+7;
int32_t main()
{
    long long n, k;
    cin >> n >> k;
    long long res = 0;
    k--;
    for (long long i = n - 1; i >= 0; i--) {
        int child = k & 0b1;
        k = k >> 1;
        res = (res + (child << i) % mod ) % mod;
    }
    cout << (res + 1) % mod;

    return 0;
}

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