You are given three integers A, B and C. Find the minimum number of operations required to make A, B and C all equal by repeatedly performing the following two kinds of operations in any order:    * Choose two among A, B and C, then increase both by 1.   * Choose one among A, B and C, then increase it by 2.  It can be proved that we can always make A, B and C all equal by repeatedly performing these operations.
arr=list(map(int,input().split()))
arr=sorted(arr)
if arr[0]%2==arr[2]%2:
  print(arr[2]-arr[1]+(arr[2]-arr[0])//2)
else:
  print(arr[2]-arr[1]+1+(arr[2]+1-arr[0])//2)
arr=list(map(int,input().split()))
arr=sorted(arr)
if (arr[0]+arr[2]-arr[1])%2==arr[2]%2:
  print(arr[2]-arr[1]+(arr[1]-arr[0])//2)
else:
  print(arr[2]-arr[1]+1+(arr[1]+1-arr[0])//2)