Submission #1097236

#	Time	Username	Problem	Language	Result	Execution time	Memory
1097236		vjudge1	Rack (eJOI19_rack)	C++11	40 / 100	1 ms	348 KiB

rack

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

/*

000 001 010 011 100 101 110 111
1   5   3   7   2   6   4   8
*/
ll solve(int n, ll k) {
    if (n == 1) {
        return k;
    }
    ll base = 1ll<<(n-1), k_reves = 0;
    k -= 1;
    while (base) {
        k_reves += (k%2) * base;
        k /= 2;
        base /= 2;
    }
    return k_reves + 1;
}
int main() {
    cin.sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    ll k;
    cin >> n >> k;
    cout << solve(n, k) << "\n";
    cout.flush();
    return EXIT_SUCCESS;
}

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