rust day 1 part 2

2022/01/02.rs

@@ -0,0 +1,36 @@
+use std::io;
+
+fn main() -> io::Result<()> {
+    // read from stdin
+    let stdin = io::stdin();
+    let lines = stdin.lines();
+
+    let mut elves = Vec::new();
+    let mut c_sum = 0;
+    for line in lines {
+        let content = line.unwrap();
+        if content.is_empty() {
+            elves.push(c_sum);
+            c_sum = 0;
+        } else {
+            let new_val = match content.parse::<i32>() {
+                Ok(v) => v,
+                Err(_e) =>{ println!("Error parsing input");  0 }
+            };
+            c_sum += new_val;
+        }
+    }
+    
+    elves.sort();
+    elves.reverse();
+    let mut result = 0;
+    if elves.len() > 3 {
+        for n in 0..3 {
+            result += elves[n];
+        }
+        println!("{}", result);
+    } else {
+        println!("Not enough elves");
+    }
+    Ok(())
+}