feat(340): completed both challenges

2 files changed, 51 insertions, 0 deletions

diff --git a/challenge-340/benjamin-andre/rust/ch-1.rs b/challenge-340/benjamin-andre/rust/ch-1.rs
new file mode 100755
index 0000000000..235095ac87
--- /dev/null
+++ b/challenge-340/benjamin-andre/rust/ch-1.rs
@@ -0,0 +1,23 @@
+#!/bin/sh
+//usr/bin/env rustc --test $0 -o kachow && ./kachow --nocapture; rm -f kachow ; exit
+
+fn duplicate_removals(s: &str) -> String {
+    let mut stack = Vec::new();
+    for c in s.chars() {
+        if stack.last() == Some(&c) {
+            stack.pop();
+        } else {
+            stack.push(c);
+        }
+    }
+    stack.into_iter().collect()
+}
+
+#[test]
+fn example() {
+    assert_eq!(duplicate_removals("abbaca"), "ca");
+    assert_eq!(duplicate_removals("azxxzy"), "ay");
+    assert_eq!(duplicate_removals("aaaaaaaa"), "");
+    assert_eq!(duplicate_removals("aabccba"), "a");
+    assert_eq!(duplicate_removals("abcddcba"), "");
+}
diff --git a/challenge-340/benjamin-andre/rust/ch-2.rs b/challenge-340/benjamin-andre/rust/ch-2.rs
new file mode 100755
index 0000000000..597b2d7fe5
--- /dev/null
+++ b/challenge-340/benjamin-andre/rust/ch-2.rs
@@ -0,0 +1,28 @@
+#!/bin/sh
+//usr/bin/env rustc --test $0 -o kachow && ./kachow --nocapture; rm -f kachow ; exit
+
+fn ascending_numbers(s: &str) -> bool {
+    let numbers: Vec<u32> = s
+        .split_whitespace()
+        .filter_map(|token| token.parse().ok())
+        .collect();
+    numbers.windows(2).all(|w| w[0] < w[1])
+}
+
+#[test]
+fn example() {
+    assert_eq!(
+        ascending_numbers("The cat has 3 kittens 7 toys 10 beds"),
+        true
+    );
+    assert_eq!(
+        ascending_numbers("Alice bought 5 apples 2 oranges 9 bananas"),
+        false
+    );
+    assert_eq!(
+        ascending_numbers("I ran 1 mile 2 days 3 weeks 4 months"),
+        true
+    );
+    assert_eq!(ascending_numbers("Bob has 10 cars 10 bikes"), false);
+    assert_eq!(ascending_numbers("Zero is 0 one is 1 two is 2"), true);
+}