添加 0332.重新安排行程 Rust版本

添加 0332.重新安排行程 Rust版本

problems/0332.重新安排行程.md

@@ -742,5 +742,33 @@ func (p ticketSlice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 
 ```
 
+### Rust
+** 文中的Hashmap嵌套Hashmap的方法因为Rust的所有权问题暂时无法实现，此方法为删除哈希表中元素法 **
+```Rust
+use std::collections::HashMap;
+impl Solution {
+    fn backtracking(airport: String, targets: &mut HashMap<&String, Vec<&String>>, result: &mut Vec<String>) {
+        while let Some(next_airport) = targets.get_mut(&airport).unwrap_or(&mut vec![]).pop() {
+            Self::backtracking(next_airport.clone(), targets, result);
+        }
+        result.push(airport.clone());
+    }
+
+    pub fn find_itinerary(tickets: Vec<Vec<String>>) -> Vec<String> {
+        let mut targets: HashMap<&String, Vec<&String>> = HashMap::new();
+        let mut result = Vec::new();
+        for t in 0..tickets.len() {
+            targets.entry(&tickets[t][0]).or_default().push(&tickets[t][1]);
+        }
+            for (_, target) in targets.iter_mut() {
+            target.sort_by(|a, b| b.cmp(a));
+        }
+        Self::backtracking("JFK".to_string(), &mut targets, &mut result);
+        result.reverse();
+        result
+    }
+}
+```
+
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