Sorted Order Check

Write a program to find whether the given array is sorted in ascending or descending order.

Input Format:

Input consists of n+1 integers. The first integer corresponds to ‘n’ , the size of the array. The next ‘n’ integers correspond to the elements in the first array. Assume that the maximum value of n is 15.

Output Format:

Print yes if the array is sorted in ascending or descending order. Print no if the array is not sorted in ascending or descending order .

Sample Input 1: 
 5
 2
 3
 6
 8
 10

Sample Output 1: 
 yes

Sample Input 2: 
 5
 20
 13
 6
 4
 1

Sample Output 2: 
yes

Sample Input 2: 
5
20
13
6
4
10

Sample Output 3: 
 no

Code:

  #include<stdio.h>
int main(){
  int a[15],n,i,aflag=0,bflag=0;
  scanf("%d",&n);
  for(i=0;i<n;i++)
  {
    scanf("%d",&a[i]);
    if(i>0){
      if((a[i-1]>a[i]))
        aflag++;
      else
        bflag++;
    }
  }
  if(aflag==(n-1)||(bflag==(n-1)))
    printf("yes");
  else
    printf("no");
  return 0;
}