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-rw-r--r--remove-duplicate-letters/src/main.rs27
1 files changed, 27 insertions, 0 deletions
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>()
+ }
+}