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blogs/Algorithm/剑指 Offer/递归相关.md

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+---
+递归相关
+---
+
+#### [10- I. 斐波那契数列](https://leetcode-cn.com/problems/fei-bo-na-qi-shu-lie-lcof/)
+
+```java
+class Solution {
+
+    public int fib(int n) {
+        if (n == 0 || n == 1) {
+            return n;
+        }
+        int start = 0;
+        int end = 1;
+        int result = 0;
+        for (int i = 2; i <= n; i++) {
+            result = (start + end) % 1000000007;
+            start = end;
+            end = result;
+        }
+        return result;
+    }
+}
+```
+