Submission #894325

#	Time	Username	Problem	Language	Result	Execution time	Memory
894325		vjudge1	Rack (eJOI19_rack)	C++17	0 / 100	0 ms	348 KiB

rack

#include <iostream>
#include <fstream>
#include <iomanip>
#include <vector>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <cmath>
#include <cassert>
#include <ctime>
#include <algorithm>
#include <sstream>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <cstdlib>
#include <cstdio>
#include <iterator>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <stdio.h>
#include <bitset>
#include <cstdint>
#include <cassert>
#include <functional>
#include <complex>
#include <climits>
#include <random>
using namespace std;
   
#define ll long long
#define pb push_back
#define ull unsigned long long
#define F first
#define S second
#define all(v) v.begin(), v.end()

const int INF = INT_MAX;
const int block = 500;
const ll mod = (ll) 1e9 + 7;

void solve(){
	ll ans = 0, c = 1;
         ll n, k;
	cin >> n >> k;
	k = k - 1;
	for(int i = 0; i < n - log2(k) - 1; i++){
		c = (c * 2) % mod;
	}
	for(int i = 0; i < 30; i++){
		if(k & (1 << i)){
			ans += c;
			if(ans > mod) ans -= mod;
		}
		c = (c * 2) % mod;
	}
	cout << ans + 1;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
    int xach = 1; 
    //cin >> xach;
    while(xach--) solve();
}

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