From 73590631ec3e17e727cca5a56024a07967946668 Mon Sep 17 00:00:00 2001
From: fwqaaq <fwqaaq@gmail.com>
Date: Sat, 27 May 2023 18:49:18 +0800
Subject: [PATCH] =?UTF-8?q?Update=200518.=E9=9B=B6=E9=92=B1=E5=85=91?=
 =?UTF-8?q?=E6=8D=A2II.md=20=E4=BC=98=E5=8C=96=20Rust?=
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---
 problems/0518.零钱兑换II.md | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/problems/0518.零钱兑换II.md b/problems/0518.零钱兑换II.md
index c208754f..8da35114 100644
--- a/problems/0518.零钱兑换II.md
+++ b/problems/0518.零钱兑换II.md
@@ -282,17 +282,18 @@ func change(amount int, coins []int) int {
 
 Rust:
 ```rust
-pub fn change(amount: i32, coins: Vec<i32>) -> i32 {
-    let amount = amount as usize;
-    let coins = coins.iter().map(|&c|c as usize).collect::<Vec<usize>>();
-    let mut dp = vec![0usize; amount + 1];
-    dp[0] = 1;
-    for i in 0..coins.len() {
-        for j in coins[i]..=amount {
-            dp[j] += dp[j - coins[i]];
+impl Solution {
+    pub fn change(amount: i32, coins: Vec<i32>) -> i32 {
+        let amount = amount as usize;
+        let mut dp = vec![0; amount + 1];
+        dp[0] = 1;
+        for coin in coins {
+            for j in coin as usize..=amount {
+                dp[j] += dp[j - coin as usize];
+            }
         }
+        dp[amount]
     }
-    dp[amount] as i32
 }
 ```