Contest: Task: Related: TaskB

Score : $300$ points

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.

- $0 \leq A,B,C \leq 50$
- All values in input are integers.

Input is given from Standard Input in the following format:

$A$ $B$ $C$

Print the minimum number of operations required to make $A$, $B$ and $C$ all equal.

2 5 4

2

We can make $A$, $B$ and $C$ all equal by the following operations:

- Increase $A$ and $C$ by $1$. Now, $A$, $B$, $C$ are $3$, $5$, $5$, respectively.
- Increase $A$ by $2$. Now, $A$, $B$, $C$ are $5$, $5$, $5$, respectively.

2 6 3

5

31 41 5

23