add initial data

remove-duplicates-from-sorted-array/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "remove-duplicates-from-sorted-array"
+version = "0.1.0"

remove-duplicates-from-sorted-array/Cargo.toml

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+[package]
+name = "remove-duplicates-from-sorted-array"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

remove-duplicates-from-sorted-array/src/main.rs

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+fn main() {
+    let mut v = vec![1, 1, 2];
+    dbg!(remove_duplicates(&mut v));
+    dbg!(v);
+
+    let mut v = vec![0, 0, 1, 1, 1, 2, 2, 3, 3, 4];
+    dbg!(remove_duplicates(&mut v));
+    dbg!(v);
+}
+
+fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
+    let mut result = 1;
+
+    let mut unique_nums = vec![nums.first().cloned().unwrap()];
+    let mut previous = *unique_nums.first().unwrap();
+
+    for item in &mut *nums {
+        if *item != previous {
+            result += 1;
+            unique_nums.push(*item);
+            previous = *item;
+        }
+    }
+
+    // write back
+    nums.clear();
+    for item in unique_nums {
+        nums.push(item);
+    }
+
+    result
+}