feat(344): completed both challenges

2 files changed, 51 insertions, 0 deletions

diff --git a/challenge-344/benjamin-andre/rust/ch-1.rs b/challenge-344/benjamin-andre/rust/ch-1.rs
new file mode 100755
index 0000000000..a0445b65dc
--- /dev/null
+++ b/challenge-344/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 array_form_compute(ints: &[i32], x: i32) -> Vec<i32> {
+    let num: i64 = ints.iter().fold(0, |acc, &d| acc * 10 + d as i64);
+    let sum = num + x as i64;
+    sum.to_string()
+        .chars()
+        .map(|c| c.to_digit(10).unwrap() as i32)
+        .collect()
+}
+
+#[test]
+fn example() {
+    assert_eq!(array_form_compute(&[1, 2, 3, 4], 12), vec![1, 2, 4, 6]);
+    assert_eq!(array_form_compute(&[2, 7, 4], 181), vec![4, 5, 5]);
+    assert_eq!(array_form_compute(&[9, 9, 9], 1), vec![1, 0, 0, 0]);
+    assert_eq!(
+        array_form_compute(&[1, 0, 0, 0, 0], 9999),
+        vec![1, 9, 9, 9, 9]
+    );
+    assert_eq!(array_form_compute(&[0], 1000), vec![1, 0, 0, 0]);
+}
diff --git a/challenge-344/benjamin-andre/rust/ch-2.rs b/challenge-344/benjamin-andre/rust/ch-2.rs
new file mode 100755
index 0000000000..740ee45d31
--- /dev/null
+++ b/challenge-344/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 array_formation(source: &[&[i32]], target: &[i32]) -> bool {
+    let mut pos = 0;
+    while pos < target.len() {
+        let chunk = source
+            .iter()
+            .find(|&&s| s.len() <= target.len() - pos && s == &target[pos..pos + s.len()]);
+        match chunk {
+            Some(c) => pos += c.len(),
+            None => return false,
+        }
+    }
+    true
+}
+
+#[test]
+fn example() {
+    assert_eq!(array_formation(&[&[2, 3], &[1], &[4]], &[1, 2, 3, 4]), true);
+    assert_eq!(array_formation(&[&[1, 3], &[2, 4]], &[1, 2, 3, 4]), false);
+    assert_eq!(
+        array_formation(&[&[9, 1], &[5, 8], &[2]], &[5, 8, 2, 9, 1]),
+        true
+    );
+    assert_eq!(array_formation(&[&[1], &[3]], &[1, 2, 3]), false);
+    assert_eq!(array_formation(&[&[7, 4, 6]], &[7, 4, 6]), true);
+}