Update 0279.完全平方数.md

problems/0279.完全平方数.md

@@ -331,6 +331,7 @@ var numSquares2 = function(n) {
 TypeScript：
 
 ```typescript
+// 先遍历物品
 function numSquares(n: number): number {
     const goodsNum: number = Math.floor(Math.sqrt(n));
     const dp: number[] = new Array(n + 1).fill(Infinity);
@@ -345,6 +346,20 @@ function numSquares(n: number): number {
 };
 ```
 
+```rust
+// 先遍历背包
+function numSquares(n: number): number {
+  const dp = Array(n + 1).fill(Infinity)
+  dp[0] = 0;
+  for(let i = 1; i <= n; i++){
+      for(let j = 1; j * j <= i; j++){
+          dp[i] = Math.min(dp[i], dp[i -j * j] + 1)
+      }
+  }
+  return dp[n]
+};
+```
+
 Rust:
 
 ```rust