day14

4 files changed, 304 insertions, 0 deletions

diff --git a/input/day14.txt b/input/day14.txt
new file mode 100644
index 0000000..155625a
--- /dev/null
+++ b/input/day14.txt
@@ -0,0 +1,175 @@
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+508,27 -> 508,29 -> 503,29 -> 503,35 -> 512,35 -> 512,29 -> 510,29 -> 510,27
+495,136 -> 495,127 -> 495,136 -> 497,136 -> 497,135 -> 497,136 -> 499,136 -> 499,129 -> 499,136 -> 501,136 -> 501,133 -> 501,136 -> 503,136 -> 503,135 -> 503,136 -> 505,136 -> 505,135 -> 505,136 -> 507,136 -> 507,130 -> 507,136 -> 509,136 -> 509,130 -> 509,136 -> 511,136 -> 511,127 -> 511,136 -> 513,136 -> 513,127 -> 513,136
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+495,136 -> 495,127 -> 495,136 -> 497,136 -> 497,135 -> 497,136 -> 499,136 -> 499,129 -> 499,136 -> 501,136 -> 501,133 -> 501,136 -> 503,136 -> 503,135 -> 503,136 -> 505,136 -> 505,135 -> 505,136 -> 507,136 -> 507,130 -> 507,136 -> 509,136 -> 509,130 -> 509,136 -> 511,136 -> 511,127 -> 511,136 -> 513,136 -> 513,127 -> 513,136
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+506,118 -> 506,115 -> 506,118 -> 508,118 -> 508,112 -> 508,118 -> 510,118 -> 510,115 -> 510,118 -> 512,118 -> 512,114 -> 512,118 -> 514,118 -> 514,108 -> 514,118 -> 516,118 -> 516,110 -> 516,118 -> 518,118 -> 518,116 -> 518,118 -> 520,118 -> 520,115 -> 520,118
+502,44 -> 506,44
+548,104 -> 548,105 -> 559,105 -> 559,104
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+514,44 -> 518,44
+517,150 -> 522,150
+495,136 -> 495,127 -> 495,136 -> 497,136 -> 497,135 -> 497,136 -> 499,136 -> 499,129 -> 499,136 -> 501,136 -> 501,133 -> 501,136 -> 503,136 -> 503,135 -> 503,136 -> 505,136 -> 505,135 -> 505,136 -> 507,136 -> 507,130 -> 507,136 -> 509,136 -> 509,130 -> 509,136 -> 511,136 -> 511,127 -> 511,136 -> 513,136 -> 513,127 -> 513,136
+495,136 -> 495,127 -> 495,136 -> 497,136 -> 497,135 -> 497,136 -> 499,136 -> 499,129 -> 499,136 -> 501,136 -> 501,133 -> 501,136 -> 503,136 -> 503,135 -> 503,136 -> 505,136 -> 505,135 -> 505,136 -> 507,136 -> 507,130 -> 507,136 -> 509,136 -> 509,130 -> 509,136 -> 511,136 -> 511,127 -> 511,136 -> 513,136 -> 513,127 -> 513,136
+495,15 -> 495,16 -> 501,16 -> 501,15
+499,19 -> 499,21 -> 497,21 -> 497,24 -> 508,24 -> 508,21 -> 505,21 -> 505,19
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+535,64 -> 539,64
+515,123 -> 531,123 -> 531,122
+517,42 -> 521,42
+520,44 -> 524,44
+510,150 -> 515,150
+529,64 -> 533,64
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+499,46 -> 503,46
+527,49 -> 527,51 -> 523,51 -> 523,55 -> 536,55 -> 536,51 -> 531,51 -> 531,49
+527,49 -> 527,51 -> 523,51 -> 523,55 -> 536,55 -> 536,51 -> 531,51 -> 531,49
+510,140 -> 510,141 -> 521,141 -> 521,140
+506,118 -> 506,115 -> 506,118 -> 508,118 -> 508,112 -> 508,118 -> 510,118 -> 510,115 -> 510,118 -> 512,118 -> 512,114 -> 512,118 -> 514,118 -> 514,108 -> 514,118 -> 516,118 -> 516,110 -> 516,118 -> 518,118 -> 518,116 -> 518,118 -> 520,118 -> 520,115 -> 520,118
+522,80 -> 522,75 -> 522,80 -> 524,80 -> 524,71 -> 524,80 -> 526,80 -> 526,77 -> 526,80
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+491,155 -> 491,157 -> 490,157 -> 490,160 -> 501,160 -> 501,157 -> 497,157 -> 497,155
+522,89 -> 527,89
+505,46 -> 509,46
+508,40 -> 512,40
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+523,146 -> 528,146
+518,87 -> 523,87
+495,15 -> 495,16 -> 501,16 -> 501,15
+516,146 -> 521,146
+511,38 -> 515,38
+491,155 -> 491,157 -> 490,157 -> 490,160 -> 501,160 -> 501,157 -> 497,157 -> 497,155
+510,140 -> 510,141 -> 521,141 -> 521,140
+499,19 -> 499,21 -> 497,21 -> 497,24 -> 508,24 -> 508,21 -> 505,21 -> 505,19
+522,80 -> 522,75 -> 522,80 -> 524,80 -> 524,71 -> 524,80 -> 526,80 -> 526,77 -> 526,80
+533,102 -> 533,93 -> 533,102 -> 535,102 -> 535,95 -> 535,102 -> 537,102 -> 537,99 -> 537,102 -> 539,102 -> 539,97 -> 539,102 -> 541,102 -> 541,92 -> 541,102 -> 543,102 -> 543,94 -> 543,102 -> 545,102 -> 545,99 -> 545,102 -> 547,102 -> 547,95 -> 547,102 -> 549,102 -> 549,101 -> 549,102
+508,27 -> 508,29 -> 503,29 -> 503,35 -> 512,35 -> 512,29 -> 510,29 -> 510,27
+506,118 -> 506,115 -> 506,118 -> 508,118 -> 508,112 -> 508,118 -> 510,118 -> 510,115 -> 510,118 -> 512,118 -> 512,114 -> 512,118 -> 514,118 -> 514,108 -> 514,118 -> 516,118 -> 516,110 -> 516,118 -> 518,118 -> 518,116 -> 518,118 -> 520,118 -> 520,115 -> 520,118
+495,136 -> 495,127 -> 495,136 -> 497,136 -> 497,135 -> 497,136 -> 499,136 -> 499,129 -> 499,136 -> 501,136 -> 501,133 -> 501,136 -> 503,136 -> 503,135 -> 503,136 -> 505,136 -> 505,135 -> 505,136 -> 507,136 -> 507,130 -> 507,136 -> 509,136 -> 509,130 -> 509,136 -> 511,136 -> 511,127 -> 511,136 -> 513,136 -> 513,127 -> 513,136
+524,83 -> 529,83
+491,155 -> 491,157 -> 490,157 -> 490,160 -> 501,160 -> 501,157 -> 497,157 -> 497,155
+519,144 -> 524,144
+506,118 -> 506,115 -> 506,118 -> 508,118 -> 508,112 -> 508,118 -> 510,118 -> 510,115 -> 510,118 -> 512,118 -> 512,114 -> 512,118 -> 514,118 -> 514,108 -> 514,118 -> 516,118 -> 516,110 -> 516,118 -> 518,118 -> 518,116 -> 518,118 -> 520,118 -> 520,115 -> 520,118
\ No newline at end of file
diff --git a/input/day14_ex.txt b/input/day14_ex.txt
new file mode 100644
index 0000000..1926028
--- /dev/null
+++ b/input/day14_ex.txt
@@ -0,0 +1,2 @@
+498,4 -> 498,6 -> 496,6
+503,4 -> 502,4 -> 502,9 -> 494,9
\ No newline at end of file
diff --git a/src/day14.rs b/src/day14.rs
new file mode 100644
index 0000000..97c06fe
--- /dev/null
+++ b/src/day14.rs
@@ -0,0 +1,125 @@
+const AIR: char = '.';
+const ROCK: char = '#';
+const SANDSPAWN: char = '+';
+const MOVING_SAND: char = '*';
+const STUCK_SAND: char  = 'o';
+
+pub fn run(input: String) {
+    // line segments
+    let ls: Vec<Vec<(i32,i32)>> = input.lines().map(|line| {
+        let cornersstr = line.split("->");
+        cornersstr.map(|cornerstr| {
+            let (xs,ys) = cornerstr.split_once(",").expect("coordinate didn't have a , in it!");
+            (xs.trim().parse::<i32>().expect("xs wasn't a i32!"), ys.trim().parse::<i32>().expect("ys wasn't a i32!"))
+        }).collect()
+    }).collect();
+    // Find our grid bounds,no need to have a 590 cell wide grid... or maybe you just should? idk.
+    // yeah you'll need a buffer to the left for the sand to fall off of, otherwise it hits the side and that's no good.
+    // let ((max_x, max_y),(min_x,min_y)) = ls.iter().flatten().fold(((0,0),(usize::MAX,usize::MAX)), |((max_x,max_y),(min_x,min_y)),(x,y)| {
+    //     ((x.max(*max_x), y.max(max_y)), 
+    //         (x.min(min_x), y.min(min_y)))
+    // });
+    let (max_x, max_y) = ls.iter().flatten().fold((0 as i32,0 as i32), |(max_x,max_y),(x,y)| {
+        (*x.max(&max_x),*y.max(&max_y))
+    });
+    // +2, give a row/col of buffer
+    // Actually x2, in case we have a pyramid of sand... 
+    let mut grid: Vec<Vec<char>> = (0..=(max_y+2)).map(|_| {
+        //(0..(max_x+2)).map(|_| {
+        (0..(max_x*2+2)).map(|_| {
+            AIR
+        }).collect()
+    }).collect();
+
+    // pt2; add the floor
+    let floor: usize = (max_y+2).try_into().unwrap();
+    for i in 0..(max_x*2+2) {
+        grid[floor][i as usize] = '#';
+    }
+
+    for l in ls {
+        for cs in l[..].windows(2) {
+            if cs.len() != 2 { panic!("window function failed???") }
+            let (c1, c2) = (cs[0], cs[1]);
+            let xd = c1.0 - c2.0;
+            let yd = c1.1 - c2.1;
+            if xd != 0 && yd != 0 { panic!("diagonal line segment???") } 
+            if xd != 0 {
+                let y = c1.1 as usize;
+                for x in (c1.0.min(c2.0))..=(c1.0.max(c2.0)) {
+                    grid[y][x as usize] = ROCK;
+                }
+            } else if yd != 0 {
+                let x = c1.0 as usize;
+                for y in (c1.1.min(c2.1))..=(c1.1.max(c2.1)) {
+                    grid[y as usize][x] = ROCK;
+                }
+            } else {
+                panic!("0 length line segment???")
+            }
+        }
+    }
+    let sandspawn = (500,0);
+    let mut sand = sandspawn;
+    let mut ix = 0;
+
+    'lp: loop {
+        if let Some(np) = mov(&grid,&sand) {
+            // if np.1 >= max_y.try_into().expect("max_y couldn't fit a usize???") {
+            //     println!("sand reached the end!");
+            //     break 'lp;
+            // }
+            sand = np;
+        } else {
+            // Convert the sand to a stuck sand
+            grid[sand.1][sand.0] = STUCK_SAND;
+            
+            if sand == sandspawn {
+                // If we couldn't move, and we're still on the spawn, then we're done!
+                break 'lp;   
+            } else {
+                // Otherwise, spawn a new sand
+                sand = sandspawn;
+            }
+        }
+        
+        ix += 1;
+        if ix > 1_000_000_000 {
+            eprint!("not getting out of here!");
+            break 'lp;
+        }
+    }
+
+    // Count the stuck sand
+    //print(&grid, &sandspawn, &sand);
+    let c_stuck_sand = grid.into_iter().flatten().filter(|ch| {*ch == STUCK_SAND}).count();
+    println!("Day 14: {}", c_stuck_sand);
+}
+
+fn mov(grid: &Vec<Vec<char>>, sand: &(usize,usize)) -> Option<(usize,usize)> {
+    if grid[sand.1+1][sand.0] == AIR {
+        Some((sand.0,sand.1+1))
+    } else if grid[sand.1+1][sand.0-1] == AIR {
+        Some((sand.0-1,sand.1+1))
+    } else if grid[sand.1+1][sand.0+1] == AIR {
+        Some((sand.0+1,sand.1+1))
+    } else {
+        None
+    }
+}
+
+fn print(grid: &Vec<Vec<char>>, sandspawn: &(usize,usize), sand: &(usize,usize)) {
+    for (y, line) in grid.into_iter().enumerate() {
+        for (x, ch) in line.into_iter().enumerate().skip(480) {
+            let pt = (x,y);
+            if sand == &pt {
+                print!("{}", MOVING_SAND);
+            } else if sandspawn == &pt {
+                print!("{}", SANDSPAWN);
+            } else {
+                print!("{}", ch);
+            }
+        }
+        print!("\n");
+    }
+}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 0b427f1..38ed88d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,6 +15,7 @@ mod day10;
 mod day11;
 mod day12;
 mod day13;
+mod day14;
 
 fn main() {
     day1::run(fs::read_to_string("input/day1.txt").expect("Failed to read input file!"));
@@ -30,4 +31,5 @@ fn main() {
     day11::run(fs::read_to_string("input/day11.txt").expect("Failed to read input file!"));
     day12::run(fs::read_to_string("input/day12.txt").expect("Failed to read input file!"));
     day13::run(fs::read_to_string("input/day13.txt").expect("Failed to read input file!"));
+    day14::run(fs::read_to_string("input/day14.txt").expect("Failed to read input file!"));
 }