Submission #441419

#	Time	Username	Problem	Language	Result	Execution time	Memory
441419		RaresFelix	Rack (eJOI19_rack)	C++17	100 / 100	10 ms	316 KiB

rack

#include <bits/stdc++.h>
#define MOD 1000000007ll
#define int long long
using namespace std;
int n, k, re;
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.precision(10);
    cout << fixed;
	cin >> n >> k;
	--k;
	re = 0;
	//vom inversa pe k
    for(int i = 1; i <= n; ++i)
	{
		re = (re * 2 % MOD + k%2) % MOD;
		k /= 2;
	}
	cout << (re+1)%MOD << "\n";
    return 0;
}

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