day 05

examples/day04_1.rs

@@ -1,5 +1,3 @@
-use std::collections::*;
-
 fn main() {
     let lines: Vec<String> = std::io::stdin().lines().map(|x| x.unwrap()).collect();
     let mut result = 0;

examples/day04_2.rs

@@ -1,5 +1,3 @@
-use std::collections::*;
-
 fn main() {
     let lines: Vec<String> = std::io::stdin().lines().map(|x| x.unwrap()).collect();
     let mut result = 0;

examples/day05_1.rs

@@ -0,0 +1,38 @@
+fn main() {
+    let mut lines = std::io::stdin().lines();
+    let mut crates = Vec::new();
+    let mut line = lines.next().unwrap().unwrap();
+    let crate_count = line.len()/4 + 1;
+    for _ in 0..crate_count {
+        crates.push(vec![]);
+    }
+    loop {
+        if line.chars().nth(1).unwrap().is_numeric() {
+            break;
+        }
+        for i in 0..crate_count {
+            let c = line.chars().nth(4*i+1).unwrap();
+            if c != ' ' {
+                crates[i].insert(0, c);
+            }
+        }
+        line = lines.next().unwrap().unwrap();
+    }
+    lines.next().unwrap().unwrap();
+    while let Some(Ok(line)) = lines.next() {
+        let mut parts = line.split(" ");
+        let n: usize = parts.nth(1).unwrap().parse().unwrap();
+        let from: usize = parts.nth(1).unwrap().parse().unwrap();
+        let to: usize = parts.nth(1).unwrap().parse().unwrap();
+        for _ in 0..n {
+            let c = crates[from-1].pop().unwrap();
+            crates[to-1].push(c);
+        }
+    }
+
+    for c in crates.iter_mut() {
+        print!("{}", c.pop().unwrap());
+    }
+    println!();
+    
+}

examples/day05_2.rs

@@ -0,0 +1,41 @@
+fn main() {
+    let mut lines = std::io::stdin().lines();
+    let mut crates = Vec::new();
+    let mut line = lines.next().unwrap().unwrap();
+    let crate_count = line.len()/4 + 1;
+    for _ in 0..crate_count {
+        crates.push(vec![]);
+    }
+    loop {
+        if line.chars().nth(1).unwrap().is_numeric() {
+            break;
+        }
+        for i in 0..crate_count {
+            let c = line.chars().nth(4*i+1).unwrap();
+            if c != ' ' {
+                crates[i].insert(0, c);
+            }
+        }
+        line = lines.next().unwrap().unwrap();
+    }
+    lines.next().unwrap().unwrap();
+    while let Some(Ok(line)) = lines.next() {
+        let mut parts = line.split(" ");
+        let n: usize = parts.nth(1).unwrap().parse().unwrap();
+        let from: usize = parts.nth(1).unwrap().parse().unwrap();
+        let to: usize = parts.nth(1).unwrap().parse().unwrap();
+        let mut crane = Vec::new();
+        for _ in 0..n {
+            crane.push(crates[from-1].pop().unwrap());
+        }
+        for _ in 0..n {
+            crates[to-1].push(crane.pop().unwrap());
+        }
+    }
+
+    for c in crates.iter_mut() {
+        print!("{}", c.pop().unwrap());
+    }
+    println!();
+    
+}