Struct Machine

struct Machine {
    a: Coords,
    b: Coords,
    prize: Coords,
}

Fields

a: Coords

b: Coords

prize: Coords

Implementations

impl Machine

fn get_presses(&self, offset: i64) -> Option<(i64, i64)>

For a machine, solve the pair of linear equations it represents (one in x and one in y). Due to integer division, the results may be rounded. Check they actually solve the equation, returning them if they do, otherwise return None as the prize isn’t reachable with a whole number of presses.

See also Cramer’s rule.

fn get_cost_for_prize(&self, offset: i64) -> Option<i64>

Map the number of button presses for a prize, to its cost in tokens

Trait Implementations

impl Clone for Machine

fn clone(&self) -> Machine

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Machine

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromStr for Machine

fn from_str(s: &str) -> Result<Self, Self::Err>

Parse a block of machine specification, taking:

• The first line as the delta for button A
• The second line as the delta for button B
• The third line as the position of the prize

type Err = ()

The associated error which can be returned from parsing.

impl PartialEq for Machine

fn eq(&self, other: &Machine) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Machine

impl Eq for Machine

impl StructuralPartialEq for Machine