diff --git a/数据结构与算法之美/算法之美 - 动态规划.md b/数据结构与算法之美/算法之美 - 动态规划.md
index e12a028..e2ed787 100644
--- a/数据结构与算法之美/算法之美 - 动态规划.md	
+++ b/数据结构与算法之美/算法之美 - 动态规划.md	
@@ -2,21 +2,18 @@
 
 ## 用循环实现斐波那契数列
 
+>实际上是 (n - 1) + (n - 2)
+
 ```javascript
 const Fibonacci_Cycle = (n: number): number => {
 	if (n <= 0) return 0;
 	if (n === 1) return n;
 
-	let n1 = -1;
-	let n2 = -1;
+	let n1 = 0;
+	let n2 = 0;
 	let n3 = 0;
 
 	for (let index = 0; index <= n; index++) {
-		if (index === 0) {
-			n1 = 0;
-			n2 = 0;
-			continue;
-		}
 		if (index === 1) {
 			n1 = 0;
 			n2 = 1;