From 90bdc41ca6177c95842c78d9b842db11fd0c1e0e Mon Sep 17 00:00:00 2001
From: jackfiled <xcrenchangjun@outlook.com>
Date: Thu, 15 May 2025 14:41:38 +0800
Subject: [PATCH] 20250515 finished.

---
 src/problem/mod.rs                            |  2 +
 ...t_unequal_adjacent_groups_subsequence_i.rs | 43 +++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 src/problem/p2900_longest_unequal_adjacent_groups_subsequence_i.rs

diff --git a/src/problem/mod.rs b/src/problem/mod.rs
index d37133b..ec477c1 100644
--- a/src/problem/mod.rs
+++ b/src/problem/mod.rs
@@ -654,3 +654,5 @@ mod p2094_finding_3_digit_even_numbers;
 mod p3335_total_characters_in_string_after_transformations_i;
 
 mod p3337_total_characters_in_string_after_transformations_ii;
+
+mod p2900_longest_unequal_adjacent_groups_subsequence_i;
diff --git a/src/problem/p2900_longest_unequal_adjacent_groups_subsequence_i.rs b/src/problem/p2900_longest_unequal_adjacent_groups_subsequence_i.rs
new file mode 100644
index 0000000..a895009
--- /dev/null
+++ b/src/problem/p2900_longest_unequal_adjacent_groups_subsequence_i.rs
@@ -0,0 +1,43 @@
+/**
+ * [2900] Longest Unequal Adjacent Groups Subsequence I
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn get_longest_subsequence(words: Vec<String>, groups: Vec<i32>) -> Vec<String> {
+        let mut result = vec![words[0].clone()];
+
+        let mut last_number = groups[0];
+
+        for i in 1..groups.len() {
+            if groups[i] != last_number {
+                result.push(words[i].clone());
+            }
+
+            last_number = groups[i];
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2900() {
+        assert_eq!(
+            vec_string!("e", "b"),
+            Solution::get_longest_subsequence(vec_string!("e", "a", "b"), vec![0, 0, 1])
+        );
+        assert_eq!(
+            vec_string!("a", "b", "c"),
+            Solution::get_longest_subsequence(vec_string!("a", "b", "c", "d"), vec![1, 0, 1, 1])
+        );
+    }
+}