2 files changed, 28 insertions, 0 deletions
diff --git a/replace-all-digits-with-characters/Cargo.toml b/replace-all-digits-with-characters/Cargo.toml
new file mode 100644
index 0000000..ec8606e
--- /dev/null
+++ b/replace-all-digits-with-characters/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "replace-all-digits-with-characters"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/replace-all-digits-with-characters/src/main.rs b/replace-all-digits-with-characters/src/main.rs
new file mode 100644
index 0000000..881d15a
--- /dev/null
+++ b/replace-all-digits-with-characters/src/main.rs
@@ -0,0 +1,20 @@
+fn main() {
+    println!("Hello, world!");
+    let tests = [
+        ("a1c1e1", "abcdef"),
+        ("a1b2c3d4e", "abbdcfdhe")
+    ];
+    for (input, output) in tests {
+        let result = Solution::replace_digits(input.to_string());
+        println!("{input:?} is {result:?} should be {output:?}");
+    }
+}
+
+struct Solution;
+
+impl Solution {
+    pub fn replace_digits(mut s: String) -> String {
+        unsafe {s.as_bytes_mut()}.chunks_exact_mut(2).for_each(|x| x[1] = x[0] + x[1] - b'0');
+        s
+    }
+}