제출 #988920

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
988920		Zbyszek99	Rack (eJOI19_rack)	C++17	100 / 100	7 ms	8288 KiB

rack

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define size(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace std;
//mt19937 mt;void random(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll rand(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

ll pot[1000001];

void solve()
{
    ll n,k;
    cin >> n >> k;
    k--;
    ll wyn = 1;
    ll n2 = n;
    rep2(i,1,min(62LL,n))
    {
        if((k % (1LL << i)) >= (1LL << i)/2)
        {
            wyn += pot[n2-1];
            wyn %= MOD;
        }
       // cout << wyn << " wyn\n";
       // k/=2;
        n2--;
    }
    cout << wyn << "\n";
}

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    pot[0] = 1;
    rep2(i,1,1000000)
    {
        pot[i] = pot[i-1]*2;
        pot[i] %= MOD;
    }
    //random();
    int t = 1;
   // cin >> t;
    while(t--) solve();
}

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