Add problem 3110: Score of a String

Author: EFanZh

src/lib.rs

@@ -2091,6 +2091,7 @@ pub mod problem_3101_count_alternating_subarrays;
 pub mod problem_3105_longest_strictly_increasing_or_strictly_decreasing_subarray;
 pub mod problem_3106_lexicographically_smallest_string_after_operations_with_constraint;
 pub mod problem_3107_minimum_operations_to_make_median_of_array_equal_to_k;
+pub mod problem_3110_score_of_a_string;
 pub mod problem_3350_adjacent_increasing_subarrays_detection_ii;
 
 #[cfg(test)]

src/problem_3110_score_of_a_string/iterative.rs

@@ -0,0 +1,28 @@
+pub struct Solution;
+
+// ------------------------------------------------------ snip ------------------------------------------------------ //
+
+impl Solution {
+    pub fn score_of_string(s: String) -> i32 {
+        s.as_bytes()
+            .windows(2)
+            .map(|window| i32::from(window[0].abs_diff(window[1])))
+            .sum()
+    }
+}
+
+// ------------------------------------------------------ snip ------------------------------------------------------ //
+
+impl super::Solution for Solution {
+    fn score_of_string(s: String) -> i32 {
+        Self::score_of_string(s)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_solution() {
+        super::super::tests::run::<super::Solution>();
+    }
+}

src/problem_3110_score_of_a_string/mod.rs

@@ -0,0 +1,18 @@
+pub mod iterative;
+
+pub trait Solution {
+    fn score_of_string(s: String) -> i32;
+}
+
+#[cfg(test)]
+mod tests {
+    use super::Solution;
+
+    pub fn run<S: Solution>() {
+        let test_cases = [("hello", 13), ("zaz", 50)];
+
+        for (s, expected) in test_cases {
+            assert_eq!(S::score_of_string(s.to_string()), expected);
+        }
+    }
+}