1 files changed, 64 insertions, 0 deletions
diff --git a/2016/aoc3/src/main.rs b/2016/aoc3/src/main.rs
new file mode 100644
index 0000000..678933f
--- /dev/null
+++ b/2016/aoc3/src/main.rs
@@ -0,0 +1,64 @@
+use std::io::BufReader;
+use std::io::prelude::*;
+use std::fs::File;
+
+
+struct Triangle {
+    l1: i32,
+    l2: i32,
+    l3: i32
+}
+
+impl Triangle {
+    fn is_valid(&self) -> bool {
+        (self.l1 + self.l2) > self.l3 &&
+            (self.l2 + self.l3) > self.l1 &&
+            (self.l3 + self.l1) > self.l2
+            
+    }
+}
+
+fn main() {
+    let len = read_file().iter().filter(|tri| tri.is_valid()).count();
+    println!("{} valid triangles", len);
+}
+
+fn read_file() -> Vec<Triangle> {
+    let file = BufReader::new(File::open("input.txt").unwrap());
+    let mut lines = file.lines()
+        .map(|line| line.unwrap().trim().to_string())
+        .filter(|line| line.len() > 0)
+        .peekable();
+
+    let mut results = Vec::new();
+    while lines.peek().is_some() {
+        let (t11, t21, t31) = parse_line(lines.next().unwrap());
+        let (t12, t22, t32) = parse_line(lines.next().unwrap());
+        let (t13, t23, t33) = parse_line(lines.next().unwrap());
+
+        results.push(Triangle {
+            l1: t11,
+            l2: t12,
+            l3: t13
+        });
+        results.push(Triangle {
+            l1: t21,
+            l2: t22,
+            l3: t23
+        });
+        results.push(Triangle {
+            l1: t31,
+            l2: t32,
+            l3: t33
+        });
+    }
+    results
+}
+
+fn parse_line(line: String) -> (i32, i32, i32) {
+    let mut separated = line.split_whitespace();
+    (separated.next().unwrap().trim().parse().unwrap(),
+     separated.next().unwrap().trim().parse().unwrap(),
+     separated.next().unwrap().trim().parse().unwrap())
+}
+