Add 384-shuffle-an-array.rs

Author: memorycancel

384-shuffle-an-array.rs

@@ -0,0 +1,33 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+struct Solution {
+    nums: Vec<i32>
+}
+impl Solution {
+    fn new(nums: Vec<i32>) -> Self {
+        Self { nums }
+    }
+    fn reset(&self) -> Vec<i32> {
+        self.nums.clone()
+    }
+    fn shuffle(&self) -> Vec<i32> {
+        let mut nums = self.nums.clone();
+        let mut n = nums.len() as u128;
+        while n > 1 {
+            let m = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_nanos() % n;
+            nums.swap(m as usize, n as usize - 1);
+            n -= 1;
+        }
+        nums
+    }
+}
+
+fn main() {
+    let nums = vec![1, 2, 3];
+    let obj = Solution::new(nums);
+    let ret_1: Vec<i32> = obj.reset();
+    println!("{:?}", ret_1);
+    let ret_2: Vec<i32> = obj.shuffle();
+    println!("{:?}", ret_2);
+    let ret_3: Vec<i32> = obj.reset();
+    println!("{:?}", ret_3);
+}