ABC 045, not finished yet, got idea for c

atcoder/beginner_contests/abc045/src/bin/a.rs

@@ -0,0 +1,13 @@
+use proconio::input;
+
+fn main() {
+    input!{
+        a: u16,
+        b: u16,
+        h: u16,
+    };
+
+    let result = h * (a + b) / 2;
+
+    println!("{}", {result});
+}

atcoder/beginner_contests/abc045/src/bin/b.rs

@@ -0,0 +1,64 @@
+use proconio::input;
+use std::collections::VecDeque;
+
+enum Winner {
+    Alice,
+    Bob,
+    Charlie,
+}
+
+fn parse_char(c: char) -> Winner {
+    let result : Winner;
+
+    match c {
+        'a' => result = Winner::Alice,
+        'b' => result = Winner::Bob,
+        _ => result = Winner::Charlie,
+    }
+
+    result
+}
+
+fn main() {
+    input!{
+        sa: String,
+        sb: String,
+        sc: String,
+    };
+
+    let mut alice : VecDeque<char> = sa.chars().collect();
+    let mut bob : VecDeque<char> = sb.chars().collect();
+    let mut charlie : VecDeque<char> = sc.chars().collect();
+
+    let mut winner = Winner::Alice;
+
+    loop {
+        if let Winner::Alice = winner {
+            let p = alice.pop_front();
+            match p {
+                None => break,
+                Some(c) => winner = parse_char(c),
+            }
+        }
+        if let Winner::Bob = winner {
+            let p = bob.pop_front();
+            match p {
+                None => break,
+                Some(c) => winner = parse_char(c),
+            }
+        }
+        if let Winner::Charlie = winner {
+            let p = charlie.pop_front();
+            match p {
+                None => break,
+                Some(c) => winner = parse_char(c),
+            }
+        }
+    }
+
+    match winner {
+        Winner::Alice => println!("A"),
+        Winner::Bob => println!("B"),
+        Winner::Charlie => println!("C"),
+    }
+}

atcoder/beginner_contests/abc045/src/bin/c.rs

@@ -0,0 +1,14 @@
+use proconio::input;
+
+
+fn main() {
+    input!{
+        s: String,
+    };
+
+    let ns : Vec<u64> = s.chars().map(|c| u64::from(c.to_digit(10).unwrap())).collect();
+    let nns = vec![ns];
+    let mut result : u64 = 0;
+
+    println!("{}", {result});
+}

atcoder/beginner_contests/abc045/src/bin/d.rs

@@ -0,0 +1,5 @@
+use proconio::input;
+
+fn main() {
+    todo!();
+}