diff --git a/001.rs b/001.rs
new file mode 100644
index 0000000..493d369
--- /dev/null
+++ b/001.rs
@@ -0,0 +1,19 @@
+fn same_to_next(lst: &[i32]) -> Vec<i32> {
+    let mut _lst: Vec<i32> = Vec::new();
+
+    for idx in 0..(lst.len() - 1) {
+        if lst[idx] == lst[idx + 1] {
+            _lst.push(lst[idx]);
+        }
+    }
+
+    return _lst
+}
+
+fn main() {
+    let check = vec![1, 2, 2, 2, 3, 3, 4];
+    println!("{:?}", same_to_next(&check)); // [2, 2, 3]
+
+    let check: Vec<i32> = (1..=10).collect();
+    println!("{:?}", same_to_next(&check)); // []
+}
\ No newline at end of file