Added solution of problem 1544

Author: kurpenok

src/solutions/mod.rs

@@ -325,6 +325,7 @@ pub mod s1523_count_odd_numbers_in_an_interval_range;
 pub mod s1528_shuffle_string;
 pub mod s1534_count_good_triplets;
 pub mod s1539_kth_missing_positive_number;
+pub mod s1544_make_the_string_great;
 pub mod s1550_three_consecutive_odds;
 pub mod s1619_mean_of_array_after_removing_some_elements;
 pub mod s1935_maximum_number_of_words_you_can_type;

src/solutions/s1544_make_the_string_great.rs

@@ -0,0 +1,28 @@
+pub fn make_good(s: String) -> String {
+    s.chars()
+        .fold(String::new(), |mut result, c_2| match (result.pop(), c_2) {
+            (None, c_2) => c_2.to_string(),
+            (Some(c_1), c_2) if c_1 != c_2 && c_1.to_lowercase().eq(c_2.to_lowercase()) => result,
+            (Some(c_1), c_2) => result + &c_1.to_string() + &c_2.to_string(),
+        })
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_case_1() {
+        assert_eq!(make_good("leEeetcode".to_string()), "leetcode");
+    }
+
+    #[test]
+    fn test_case_2() {
+        assert_eq!(make_good("abBAcC".to_string()), "");
+    }
+
+    #[test]
+    fn test_case_3() {
+        assert_eq!(make_good("s".to_string()), "s");
+    }
+}