diff --git a/rust/1299-Replace-Elements-With-Greatest-Element-On-Right-Side.rs b/rust/1299-Replace-Elements-With-Greatest-Element-On-Right-Side.rs
new file mode 100644
index 000000000..5caf419ad
--- /dev/null
+++ b/rust/1299-Replace-Elements-With-Greatest-Element-On-Right-Side.rs
@@ -0,0 +1,12 @@
+use std::cmp::max;
+
+impl Solution {
+    pub fn replace_elements(arr: Vec<i32>) -> Vec<i32> {
+        let length = arr.len();
+        let mut ans: Vec<i32> = vec![-1; length];
+        for i in (1..=(length - 1)).rev() {
+            ans[i - 1] = max(arr[i], ans[i]);
+        }
+        ans
+    }
+}
diff --git a/rust/392-Is-Subsequence.rs b/rust/392-Is-Subsequence.rs
new file mode 100644
index 000000000..0853fe2db
--- /dev/null
+++ b/rust/392-Is-Subsequence.rs
@@ -0,0 +1,17 @@
+impl Solution {
+    pub fn is_subsequence(s: String, t: String) -> bool {
+        let s: Vec<char> = s.chars().collect();
+        let t: Vec<char> = t.chars().collect();
+        let mut l = 0;
+        let mut r = 0;
+        while l < s.len() && r < t.len() {
+            if s[l] == t[r] {
+                l += 1;
+                r += 1;
+            } else {
+                r += 1;
+            }
+        }
+        l == s.len()
+    }
+}