Submission #731016

#	Time	Username	Problem	Language	Result	Execution time	Memory
731016		aykhn	Rack (eJOI19_rack)	C++14	0 / 100	1 ms	212 KiB

rack

#include <bits/stdc++.h>

/*
    author: aykhn
    4/24/2023
*/

using namespace std;

typedef long long ll;

#define OPT ios_base::sync_with_stdio(0); \
            cin.tie(0); \
            cout.tie(0)
#define pii pair<int,int>
#define pll pair<ll,ll>
#define all(v) v.begin(), v.end()
#define mpr make_pair
#define pb push_back
#define ts to_string
#define fi first
#define se second
#define inf 0x3F3F3F3F
#define infll 0x3F3F3F3F3F3F3F3FLL
#define bpc __builtin_popcount
#define print(v) for(int i = 0; i < v.size(); i++) cout << v[i] << " "; cout<<endl;

const ll mod = 1000000007;

int main()
{
    OPT;
    ll n, k;
    cin >> n >> k;

    ll pow = 1;

    for (ll i = 1; i <= n; i++) pow = (pow << 1) % mod;
    if (k%2) cout << (k + 1)/2 << endl;
    else cout << pow - k/2 + 1;
}

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