20240507 Finished

src/problem/mod.rs

@@ -123,3 +123,4 @@ mod p48_rotate_image;
 mod p73_set_matrix_zeroes;
 mod p289_game_of_life;
 mod p383_ransom_note;
+mod p290_word_pattern;

src/problem/p290_word_pattern.rs

@@ -0,0 +1,49 @@
+/**
+ * [290] Word Pattern
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+use std::collections::HashMap;
+
+impl Solution {
+    pub fn word_pattern(pattern: String, s: String) -> bool {
+        let words: Vec<&str> = s.split(' ').collect();
+
+        if words.len() != pattern.len() {
+            return false;
+        }
+        
+        let mut map = HashMap::new();
+        let mut reverse_map = HashMap::new();
+
+        for (c, word) in pattern.chars().zip(words) {
+            let entry = map.entry(c).or_insert(word);
+
+            if *entry != word {
+                return false;
+            }            
+
+            let entry = reverse_map.entry(word).or_insert(c);
+
+            if *entry != c {
+                return false;
+            }
+        }
+
+        true
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_290() {
+        assert!(Solution::word_pattern("abba".to_owned(), "dog cat cat dog".to_owned()));
+    }
+}