http://codeforces.com/contest/1029/problem/B

 

水题真快乐= =

 

 1 public class Main {
 2     public static void main(String[] args) {
 3         Scanner io = new Scanner(System.in);
 4         long n = io.nextInt() - 1, a = io.nextInt(), b, len = 1, ans = 1;
 5         for (int i = 1; i <= n; i++) {
 6             b = io.nextInt();
 7             if (i == n) {
 8                 if (a * 2 >= b) len++;
 9                 ans = Math.max(ans, len);
10                 break;
11             } else if (a * 2 < b) {
12                 ans = Math.max(ans, len);
13                 len = 0;
14             }
15             len++;
16             a = b;
17         }
18         System.out.println(ans);
19     }
20 }