Submission #1096886

#	Time	Username	Problem	Language	Result	Execution time	Memory
1096886		sadsadsa	Rack (eJOI19_rack)	C++14	100 / 100	4 ms	456 KiB

rack

#include <bits/stdc++.h>

using namespace std;

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    long long int n,k;
    long long int g = 1;
    long long int b = 1;
    cin >> n >> k;
    k-=1;
    for (int i = 0; i < n; i++)
    {
    //    cout << g << " " << k%2 << "\n";
        b *= 2;
        b %= 1000000007;
        g = (g*2)+k%2;
        g %= 1000000007;
        k /= 2;

    }
    b -= 1;
    b %= 1000000007;
   // cout << b << "\n";
    if (b > g)
    {
        b -= g;
        g = 1000000007-b;
    }
    else
    {
        g -= b;
    }
    cout << g;
}

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