Submission #1340630

#	Time	Username	Problem	Language	Result	Execution time	Memory
1340630		kawhiet	Rack (eJOI19_rack)	C++20	40 / 100	1 ms	344 KiB

rack

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

#define int long long

constexpr int mod = 1e9 + 7;

int power(int a, int b) {
    int res = 1;
    while (b > 0) {
        if (b & 1) {
            res = res * a % mod;
        }
        a = a * a % mod;
        b >>= 1;
    }
    return res;
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, k;
    cin >> n >> k;
    k--;
    int ans = 0;
    for (int i = n - 1; i >= 0; i--) {
        if (k & (1 << i)) {
            ans += 1 << (n - i - 1);
        }
    }
    cout << ans + 1 << '\n';
    return 0;
}

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