Day 5 Part 1 complete

src/solutions/day05.rs

@@ -1,13 +1,23 @@
 use super::Solution;
+use itertools::Itertools;
 
 pub struct Day05 {}
 
 impl Solution for Day05 {
     fn part1(
         &self,
-        _input: &mut Vec<String>,
+        input: &mut Vec<String>,
     ) -> Result<Box<dyn std::fmt::Display>, Box<dyn std::error::Error>> {
-        Ok(Box::new("Ready"))
+        let (seeds, maps) = self.get_mappings(input)?;
+        let locations = maps.iter().fold(seeds, |seeds, mappings|
+            seeds.iter().map(|&seed|
+              mappings.iter()
+                .find(|&&(_, src, range)| (src..src+range).contains(&seed))
+                .map(|(dst, src, _)| dst + seed - src)
+                .unwrap_or(seed)
+            ).collect()
+        );
+        Ok(Box::new(*locations.iter().min().unwrap()))
     }
 
     fn part2(
@@ -22,7 +32,26 @@ impl Solution for Day05 {
     }
 }
 
-impl Day05 {}
+impl Day05 {
+    fn get_mappings(&self, input: &Vec<String>) -> Result<(Vec<usize>, Vec<Vec<(usize, usize, usize)>>), Box<dyn std::error::Error>> {
+        let seeds: Vec<usize> = input[0].split_whitespace()
+        .skip(1)
+        .map(|s| s.parse().unwrap())
+        .collect::<Vec<_>>();
+
+        let maps: Vec<Vec<(usize, usize, usize)>> = input[2..input.len()].join("\n")
+        .split("\n\n").map(|s|
+            s.split('\n').skip(1).map(|l|
+                l.split_whitespace()
+                  .map(|s| s.parse().unwrap())
+                  .collect_tuple()
+                  .unwrap()
+            ).collect::<Vec<_>>()
+        ).collect::<Vec<_>>();
+
+        Ok((seeds, maps))
+    }
+}
 
 /// Test from puzzle input
 #[cfg(test)]
@@ -44,7 +73,7 @@ mod test {
             .unwrap()
             .to_string();
 
-        assert_eq!(answer, "Ready");
+        assert_eq!(answer, "35");
     }
 
     #[test]

src/solutions/day06.rs

@@ -18,7 +18,7 @@ impl Solution for Day06 {
     }
 
     fn get_day(&self) -> u8 {
-        5
+        6
     }
 }