Submission #1179270

#	Time	Username	Problem	Language	Result	Execution time	Memory
1179270		vladkonoval	Rack (eJOI19_rack)	C++20	0 / 100	0 ms	324 KiB

rack

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
using ll = long long;
ll a,b;
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>a>>b;
    if (b==1) cout<<1;
    else
    cout<<((1<<a)-a+1-b+1)%1000000007;
    return 0;
}

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