添加 0860.柠檬水找零 Rust版本

添加 0860.柠檬水找零 Rust版本

problems/0860.柠檬水找零.md

@@ -251,6 +251,38 @@ var lemonadeChange = function(bills) {
 };
 
 ```
+
+### Rust
+
+```Rust
+impl Solution {
+    pub fn lemonade_change(bills: Vec<i32>) -> bool {
+        let mut five = 0;
+        let mut ten = 0;
+        // let mut twenty = 0;
+        for bill in bills {
+            if bill == 5 { five += 1; }
+            if bill == 10 {
+                if five <= 0 { return false; }
+                ten += 1;
+                five -= 1;
+            }
+            if bill == 20 {
+                if five > 0 && ten > 0 {
+                    five -= 1;
+                    ten -= 1;
+                    // twenty += 1;
+                } else if five >= 3 {
+                    five -= 3;
+                    // twenty += 1;
+                } else { return false; }
+            }
+        }
+        true
+    }
+}
+```
+
 ### C
 ```c
 bool lemonadeChange(int* bills, int billsSize){