Struct StringToStringCorrection 

pub struct StringToStringCorrection { /* private fields */ }

The String-to-String Correction problem.

Given an alphabet of size a, a source string s over {0, ..., a-1}, a target string t over the same alphabet, and a bound K, determine whether t can be obtained from s by applying at most K operations, where each operation is either a character deletion or a swap of two adjacent characters.

Representation

The configuration is a vector of length K. For a source string of length n, each entry is in {0, ..., 2n}:

• Values 0..current_len delete the character at that index in the current working string.
• Values current_len..2n swap the character at position value - current_len with its right neighbor.
• Value 2n is a no-op (skip this slot).

The domain size per slot is fixed at 2n + 1 regardless of how deletions shorten the working string; as the working string shrinks, some encodings that were valid before may become invalid.

Example

use problemreductions::models::misc::StringToStringCorrection;
use problemreductions::{Problem, Solver, BruteForce};

// source = [0,1,2,3,1,0], target = [0,1,3,2,1], bound = 2
let problem = StringToStringCorrection::new(4, vec![0,1,2,3,1,0], vec![0,1,3,2,1], 2);
let solver = BruteForce::new();
let solution = solver.find_witness(&problem);
assert!(solution.is_some());

Implementations

impl StringToStringCorrection

pub fn new( alphabet_size: usize, source: Vec<usize>, target: Vec<usize>, bound: usize, ) -> Self

Create a new StringToStringCorrection instance.

Panics

Panics if alphabet_size is 0 when the source or target string is non-empty, or if any symbol in source or target is >= alphabet_size.

pub fn alphabet_size(&self) -> usize

Returns the alphabet size.

pub fn source(&self) -> &[usize]

Returns the source string.

pub fn target(&self) -> &[usize]

Returns the target string.

pub fn bound(&self) -> usize

Returns the operation bound.

pub fn source_length(&self) -> usize

Returns the length of the source string.

pub fn target_length(&self) -> usize

Returns the length of the target string.

Trait Implementations

impl Clone for StringToStringCorrection

fn clone(&self) -> StringToStringCorrection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StringToStringCorrection

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StringToStringCorrection

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Problem for StringToStringCorrection

const NAME: &'static str = "StringToStringCorrection"

Base name of this problem type (e.g., “MaximumIndependentSet”).

type Value = Or

The evaluation value type.

fn variant() -> Vec<(&'static str, &'static str)>

Returns variant attributes derived from type parameters.

fn dims(&self) -> Vec<usize>

Configuration space dimensions. Each entry is the cardinality of that variable.

fn evaluate(&self, config: &[usize]) -> Or

Evaluate the problem on a configuration.

fn num_variables(&self) -> usize

Number of variables (derived from dims).

fn problem_type() -> ProblemType

Look up this problem’s catalog entry.

impl ReduceTo<ILP> for StringToStringCorrection

type Result = ReductionSTSCToILP

The reduction result type.

fn reduce_to(&self) -> Self::Result

Reduce this problem to the target problem type.

impl Serialize for StringToStringCorrection

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl DeclaredVariant for StringToStringCorrection