initial commit

01-sonar-sweep/.gitignore

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+/target

01-sonar-sweep/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "sonar-sweep"
+version = "0.1.0"

01-sonar-sweep/Cargo.toml

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+[package]
+name = "sonar-sweep"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

01-sonar-sweep/LICENSE

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+The MIT License (MIT)
+Copyright (c) 2021 danielyrovas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

01-sonar-sweep/puzzle.md

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+### puzzle
+find rate of increase of depth
+count number of times a depth measurement increases from the previous measurement

01-sonar-sweep/src/main.rs

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+#![allow(dead_code, unused_imports)]
+
+use std::{io::{stdin, Read}, str::FromStr};
+
+fn main() {
+  let depths = read_depths();
+  let mut n = 0;
+  let mut prev = 0;
+  let mut f: Option<u32> = None;
+  let mut p: Option<u32> = None;
+  let mut window;
+  for &depth in depths.iter() {
+    if f == None { f = Some(depth); continue; }
+    if p == None { p = f; continue; }
+    window = f.unwrap() + p.unwrap() + &depth;
+    // update variables that store prior 2 iterations state
+    f = p;
+    p = Some(depth);
+    if prev == 0 {
+      println!("{}, (no prior data)", window)
+    } else if window > prev {
+      n += 1;
+      println!("{}, (increased)", window);
+    } else if prev > window {
+      println!("{}, (decreased)", window)
+    } else {
+      println!("{}, (no change)", window)
+    }
+    prev = window;
+  }
+  println!("number of increases: {}", n);
+}
+
+fn read_depths() -> Vec<u32> {
+  let mut s = String::new();
+  stdin().read_to_string(&mut s).unwrap();
+  let result = s
+    .lines()
+    .map(u32::from_str)
+    .collect::<Result<Vec<_>, _>>();
+  result.unwrap()
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn print_input() {
+    read_depths();
+  }
+}