def get_odd_occurence(arr, arr_size):
  
  for i in range(0, arr_size):
    count = 0
    for j in range(0, arr_size):
      if arr[i] == arr[j]:
        count += 1
    if (count % 2 != 0):
      return arr[i]
  return -1
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result