#include<iostream>
using namespace std;
int a[99],n;
int interval(int a[99],int n)
{
    int x,y,aux,nr=0,i;
    x=a[0]; y=a[n-1];
    if(x>y)
    {
        aux=x;
        x=y;
        y=aux;
    }
    for(i=0;i<n;i++)
        if((a[i]>=x)&&(a[i]<=y))
            nr++;
    return nr;
}