Submission #810889

#	Time	Username	Problem	Language	Result	Execution time	Memory
810889		AlphaMale06	Rack (eJOI19_rack)	C++14	40 / 100	1 ms	212 KiB

rack

#include <bits/stdc++.h>

using namespace std;
#define int long long
const int mod = 1e9+7;

signed main()
{
    int n, k;
    cin >> n >> k;
    int ans=1;
    int cnt=1;
    k--;
    while(k>0){
        if(k&1){
            ans+=1ll<<(n-cnt);
        }
        ans%=mod;
        cnt++;
        k/=2;
    }
    cout << ans << '\n';
}

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