merged update
This commit is contained in:
WanderingPenwing
parent
9a0a9afe37
commit
e06c9db089
168
src/main.rs
168
src/main.rs
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@ -1,5 +1,5 @@
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use std::fmt;
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use std::fmt;
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use std::collections::HashSet;
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//use std::collections::HashSet;
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use rand::seq::SliceRandom;
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use rand::seq::SliceRandom;
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#[derive(Clone)]
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#[derive(Clone)]
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@ -21,7 +21,7 @@ impl Cell {
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self.possibilities = (1..=9).collect();
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self.possibilities = (1..=9).collect();
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}
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}
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fn remove_possibilities(&mut self, possibilities: &HashSet<u8>) {
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fn remove_possibilities(&mut self, possibilities: &Vec<u8>) {
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self.possibilities.retain(|&x| !possibilities.contains(&x))
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self.possibilities.retain(|&x| !possibilities.contains(&x))
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}
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}
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}
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}
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@ -87,63 +87,28 @@ impl Sudoku {
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}
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}
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fn update_possibilities(&mut self) {
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fn update_possibilities(&mut self) {
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self.update_rows();
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let mut row_used_values: [Vec<u8>;9] = [vec![],vec![],vec![],vec![],vec![],vec![],vec![],vec![],vec![]];
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self.update_columns();
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let mut column_used_values: [Vec<u8>;9] = [vec![],vec![],vec![],vec![],vec![],vec![],vec![],vec![],vec![]];
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self.update_squares();
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let mut square_used_values: [[Vec<u8>;3];3] = [[vec![],vec![],vec![]],[vec![],vec![],vec![]],[vec![],vec![],vec![]]];
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}
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fn update_rows(&mut self) {
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for row_index in 0..9 {
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for row_index in 0..9 {
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for column_index in 0..9 {
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let mut used_values: HashSet<u8> = HashSet::new();
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let Some(value) = self.grid[row_index][column_index].value else {
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continue
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};
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row_used_values[row_index].push(value);
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column_used_values[column_index].push(value);
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square_used_values[row_index/3][column_index/3].push(value);
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}
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}
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for column_index in 0..9 {
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for row_index in 0..9 {
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if let Some(value) = self.grid[row_index][column_index].value {
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for column_index in 0..9 {
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used_values.insert(value);
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self.grid[row_index][column_index].remove_possibilities(&row_used_values[row_index]);
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}
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self.grid[row_index][column_index].remove_possibilities(&column_used_values[column_index]);
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}
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self.grid[row_index][column_index].remove_possibilities(&square_used_values[row_index/3][column_index/3]);
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}
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for column_index in 0..9 {
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}
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self.grid[row_index][column_index].remove_possibilities(&used_values);
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}
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}
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}
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fn update_columns(&mut self) {
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for column_index in 0..9 {
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let mut used_values: HashSet<u8> = HashSet::new();
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for row_index in 0..9 {
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if let Some(value) = self.grid[row_index][column_index].value {
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used_values.insert(value);
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}
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}
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for row_index in 0..9 {
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self.grid[row_index][column_index].remove_possibilities(&used_values);
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}
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}
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}
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fn update_squares(&mut self) {
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for square_row_index in 0..3 {
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for square_column_index in 0..3 {
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let mut used_values: HashSet<u8> = HashSet::new();
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for row_offset_index in 0..3 {
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for column_offset_index in 0..3 {
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if let Some(value) = self.grid[square_row_index * 3 + row_offset_index][square_column_index * 3 + column_offset_index].value {
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used_values.insert(value);
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}
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}
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}
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for row_offset_index in 0..3 {
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for column_offset_index in 0..3 {
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self.grid[square_row_index * 3 + row_offset_index][square_column_index * 3 + column_offset_index].remove_possibilities(&used_values.clone());
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}
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}
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}
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}
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}
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}
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fn collapse(&mut self) -> bool {
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fn collapse(&mut self) -> bool {
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@ -188,16 +153,14 @@ impl Sudoku {
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}
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}
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}
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}
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if let Some(choice) = fork {
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let Some(choice) = fork else {
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self.reset_possibilities();
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let mut choice_value = HashSet::new();
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choice_value.insert(choice.selected_value);
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self.grid[choice.cell_selected[0]][choice.cell_selected[1]].remove_possibilities(&choice_value);
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return self.collapse_cell(choice.cell_selected[0], choice.cell_selected[1])
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} else {
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println!("x backtracked to start");
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println!("x backtracked to start");
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return false
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return false
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}
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};
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self.reset_possibilities();
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self.grid[choice.cell_selected[0]][choice.cell_selected[1]].remove_possibilities(&vec![choice.selected_value]);
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return self.collapse_cell(choice.cell_selected[0], choice.cell_selected[1])
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}
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}
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fn reset_possibilities(&mut self) {
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fn reset_possibilities(&mut self) {
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@ -211,26 +174,61 @@ impl Sudoku {
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}
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}
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fn collapse_cell(&mut self, row_index: usize, column_index: usize) -> bool {
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fn collapse_cell(&mut self, row_index: usize, column_index: usize) -> bool {
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if let Some(&selected_value) = self.grid[row_index][column_index].possibilities.choose(&mut self.rng) {
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let Some(&selected_value) = self.grid[row_index][column_index].possibilities.choose(&mut self.rng) else {
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self.history.push(Choice {
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cell_selected: [row_index, column_index],
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possibilities: self.grid[row_index][column_index].possibilities.clone(),
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selected_value,
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});
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self.grid[row_index][column_index].set(selected_value);
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println!("# collapsing [{}][{}] ({:?}) to {}", row_index, column_index, self.grid[row_index][column_index].possibilities, selected_value);
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return true
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} else {
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println!("x no possibilities for [{}][{}]", row_index, column_index);
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println!("x no possibilities for [{}][{}]", row_index, column_index);
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return false
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return false
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};
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self.history.push(Choice {
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cell_selected: [row_index, column_index],
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possibilities: self.grid[row_index][column_index].possibilities.clone(),
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selected_value,
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});
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self.grid[row_index][column_index].set(selected_value);
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println!("# collapsing [{}][{}] ({:?}) to {}", row_index, column_index, self.grid[row_index][column_index].possibilities, selected_value);
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return true
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}
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fn solve(&mut self, display: bool) {
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if display {
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self.display();
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println!("--------");
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}
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}
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}
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self.update_possibilities();
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let mut counter: usize = 0;
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while self.collapse() {
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self.update_possibilities();
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counter +=1;
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}
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if display {
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println!("--------");
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println!("finished with {} steps", counter);
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self.display();
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}
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}
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}
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}
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// [6,0,0,0,0,2,1,0,0], // has to backtrack
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// [0,3,2,9,0,0,0,7,0],
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// [0,0,0,0,0,8,0,0,0],
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// [2,0,0,0,0,0,4,0,0],
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// [7,0,3,0,0,0,9,1,0],
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// [0,8,0,0,9,4,0,0,0],
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// [0,0,4,0,0,0,6,0,0],
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// [1,2,0,7,0,0,0,0,5],
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// [0,0,0,0,0,0,0,9,4],
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fn main() {
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fn main() {
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let sudoku_set: [[u8; 9]; 9] = [
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let sudoku_set: [[u8; 9]; 9] = [
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[6,0,0,0,0,2,1,0,0],
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[0,0,0,0,0,0,0,0,0],
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[0,3,2,9,0,0,0,7,0],
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[0,3,2,9,0,0,0,7,0],
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[0,0,0,0,0,8,0,0,0],
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[0,0,0,0,0,8,0,0,0],
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[2,0,0,0,0,0,4,0,0],
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[2,0,0,0,0,0,4,0,0],
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@ -243,17 +241,5 @@ fn main() {
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let mut sudoku = Sudoku::new(sudoku_set);
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let mut sudoku = Sudoku::new(sudoku_set);
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sudoku.display();
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sudoku.solve(true);
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println!("--------");
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sudoku.update_possibilities();
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while sudoku.collapse() {
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sudoku.update_possibilities();
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}
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println!("--------");
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sudoku.display();
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}
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}
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