codeforces 253B - Physics Practical

B. Physics Practical

time limit per test

1 second

memory limit per test

256 megabytes

input

input.txt

output

output.txt

One day Vasya was on a physics practical, performing the task on measuring the capacitance. He followed the teacher's advice and did as much asn measurements, and recorded the results in the notebook. After that he was about to show the results to the teacher, but he remembered that at the last lesson, the teacher had made his friend Petya redo the experiment because the largest and the smallest results differed by more than two times. Vasya is lazy, and he does not want to redo the experiment. He wants to do the task and go home play computer games. So he decided to cheat: before Vasya shows the measurements to the teacher, he will erase some of them, so as to make the largest and the smallest results of the remaining measurements differ in no more than two times. In other words, if the remaining measurements have the smallest resultx, and the largest result y, then the inequality y ≤ 2·x must fulfill. Of course, to avoid the teacher's suspicion, Vasya wants to remove as few measurement results as possible from his notes.

Help Vasya, find what minimum number of measurement results he will have to erase from his notes so that the largest and the smallest of the remaining results of the measurements differed in no more than two times.

Input

The first line contains integer n (2 ≤ n ≤ 10⁵) — the number of measurements Vasya made. The second line containsn integers c₁, c₂, ..., c_n (1 ≤ c_i ≤ 5000) — the results of the measurements. The numbers on the second line are separated by single spaces.

Output

Print a single integer — the minimum number of results Vasya will have to remove.

Sample test(s)

Input

6
4 5 3 8 3 7

Output

2

Input

4
4 3 2 4

Output

0

Note

In the first sample you can remove the fourth and the sixth measurement results (values 8 and 7). Then the maximum of the remaining values will be 5, and the minimum one will be 3. Or else, you can remove the third and fifth results (both equal 3). After that the largest remaining result will be 8, and the smallest one will be 4.

題目大意：在一個數組中找min*2>=max，問最少去掉多少個數，就能滿足這樣的條件。

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstdlib>
using namespace std;
int a[100005];
int main()
{
    int i,n,j;
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    while(scanf("%d",&n)!=EOF)
    {
        for(i=0;i<n;i++)
        {
            scanf("%d",&a[i]);
        }
        sort(a,a+n);
        int minsum;
        int maxsum=0;
        j=0;
        for(i=0;i<n;i++)
        {
            int sum=0;
            //j=i+1;  //j一定不能放在這裏從i+1開始，這樣會超時
            while(j<n&&2*a[i]>=a[j])
            {
                j++;
            //    cout<<i<<'k';
            }
            sum=j-i;
            if(maxsum<sum) maxsum=sum;
            if(maxsum>=n-i-1) break;
        //    cout<<maxsum<<endl;
        }
        minsum=n-maxsum;
        printf("%d\n",minsum);
    }
    return 0;
}