20241219 finished.

src/problem/mod.rs

@@ -378,3 +378,5 @@ mod p1847_closest_room;
 mod p3291_minimum_number_of_valid_strings_to_form_target_i;
 
 mod p3292_minimum_number_of_valid_strings_to_form_target_ii;
+
+mod p3285_find_indices_of_stable_mountains;

src/problem/p3285_find_indices_of_stable_mountains.rs

@@ -0,0 +1,39 @@
+/**
+ * [3285] Find Indices of Stable Mountains
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn stable_mountains(height: Vec<i32>, threshold: i32) -> Vec<i32> {
+        (1..height.len())
+            .filter_map(|i| {
+                if height[i - 1] > threshold {
+                    Some(i as i32)
+                } else {
+                    None
+                }
+            })
+            .collect()
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3285() {
+        assert_eq!(
+            vec![3, 4],
+            Solution::stable_mountains(vec![1, 2, 3, 4, 5], 2)
+        );
+        assert_eq!(
+            Vec::<i32>::new(),
+            Solution::stable_mountains(vec![10, 1, 10, 1, 10], 10)
+        );
+    }
+}