feat(333): finished both challenges

2 files changed, 55 insertions, 0 deletions

diff --git a/challenge-333/benjamin-andre/rust/ch-1.rs b/challenge-333/benjamin-andre/rust/ch-1.rs
new file mode 100755
index 0000000000..e6864d6aed
--- /dev/null
+++ b/challenge-333/benjamin-andre/rust/ch-1.rs
@@ -0,0 +1,27 @@
+#!/bin/sh
+//usr/bin/env rustc --test $0 -o kachow && ./kachow --nocapture; rm -f kachow ; exit
+
+fn straight_line(points: &[[i64; 2]]) -> bool {
+    if points.len() <= 2 {
+        return true;
+    }
+
+    let [x1, y1] = points[0];
+    let [x2, y2] = points[1];
+
+    points[2..]
+        .iter()
+        .all(|&[x3, y3]| (y2 - y1) * (x3 - x1) == (y3 - y1) * (x2 - x1))
+}
+
+#[test]
+fn example() {
+    assert_eq!(straight_line(&[[2, 1], [2, 3], [2, 5]]), true);
+    assert_eq!(straight_line(&[[1, 4], [3, 4], [10, 4]]), true);
+    assert_eq!(straight_line(&[[0, 0], [1, 1], [2, 3]]), false);
+    assert_eq!(straight_line(&[[1, 1], [1, 1], [1, 1]]), true);
+    assert_eq!(
+        straight_line(&[[1000000, 1000000], [2000000, 2000000], [3000000, 3000000]]),
+        true
+    );
+}
diff --git a/challenge-333/benjamin-andre/rust/ch-2.rs b/challenge-333/benjamin-andre/rust/ch-2.rs
new file mode 100755
index 0000000000..5f15671a76
--- /dev/null
+++ b/challenge-333/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 duplicate_zeros(ints: &[i32]) -> Vec<i32> {
+    let mut result = Vec::new();
+    for &n in ints {
+        if n == 0 {
+            result.push(0);
+            result.push(0);
+        } else {
+            result.push(n);
+        }
+    }
+    result.truncate(ints.len());
+    result
+}
+
+#[test]
+fn example() {
+    assert_eq!(
+        duplicate_zeros(&[1, 0, 2, 3, 0, 4, 5, 0]),
+        vec![1, 0, 0, 2, 3, 0, 0, 4]
+    );
+    assert_eq!(duplicate_zeros(&[1, 2, 3]), vec![1, 2, 3]);
+    assert_eq!(duplicate_zeros(&[1, 2, 3, 0]), vec![1, 2, 3, 0]);
+    assert_eq!(duplicate_zeros(&[0, 0, 1, 2]), vec![0, 0, 0, 0]);
+    assert_eq!(duplicate_zeros(&[1, 2, 0, 3, 4]), vec![1, 2, 0, 0, 3]);
+}