2 files changed, 35 insertions, 0 deletions
diff --git a/remove-duplicate-letters/Cargo.toml b/remove-duplicate-letters/Cargo.toml
new file mode 100644
index 0000000..65fc799
--- /dev/null
+++ b/remove-duplicate-letters/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "remove-duplicate-letters"
+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/remove-duplicate-letters/src/main.rs b/remove-duplicate-letters/src/main.rs
new file mode 100644
index 0000000..9cc7296
--- /dev/null
+++ b/remove-duplicate-letters/src/main.rs
@@ -0,0 +1,27 @@
+fn main() {
+    println!("Hello, world!");
+    let tests = [
+        ("bcabc", "abc"),
+        ("cbacdcbc", "acdb")
+    ];
+
+    for test in tests {
+        println!("{:?} is {:?} should be {:?}", test.0,
+                 Solution::remove_duplicate_letters(test.0.to_string()), test.1);
+    }
+}
+
+struct Solution;
+
+impl Solution {
+    pub fn remove_duplicate_letters(s: String) -> String {
+        let mut a: Vec<char> = Vec::with_capacity(s.len());
+        let start = s.chars().enumerate().reduce(|a,b| if a.1 < b.1 {a} else {b});
+        for c in s.chars().skip(start.unwrap().0) {
+            if a.last().is_none() || c > *a.last().unwrap() {
+                a.push(c);
+            }
+        }
+        a.iter().collect::<String>()
+    }
+}