Submission #1137283

#	Time	Username	Problem	Language	Result	Execution time	Memory
1137283		Dragos1	Rack (eJOI19_rack)	C++20	100 / 100	7 ms	8004 KiB

rack

#include <iostream>

using namespace std;
const long long MOD=1e9+7;
long long n,k,ans=1;
long long putere[1000002];
int main()
{
    cin>>n>>k;
    putere[0]=1;
    for(int i=1;i<=n;i++)
        putere[i]=putere[i-1]*2 , putere[i]%=MOD;
    while(k>1)
    {
        if(k%2==0)
            ans+=(putere[n-1]) , ans%=MOD;
        n--;
        k++;
        k/=2;
    }
    cout<<ans;
    return 0;
}

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