Create 1331-rank-transform-of-an-array.rs

Author: memorycancel

1331-rank-transform-of-an-array.rs

@@ -0,0 +1,16 @@
+pub fn array_rank_transform(arr: Vec<i32>) -> Vec<i32> {
+    let mut sorted_arr = arr.clone();
+    sorted_arr.sort_unstable();
+    sorted_arr.dedup();
+    use std::collections::HashMap;
+    let mut mmp = HashMap::new();
+    for (i, e) in sorted_arr.iter().enumerate() {
+        mmp.insert(e, i as i32 + 1);
+    }
+    arr.iter().map(|e|mmp[e]).collect()
+}
+
+fn main() {
+    let arr = vec![40,10,20,30];
+    println!("{:?}", array_rank_transform(arr));
+}