leetcode 154

leetcode/154/154.go

@@ -0,0 +1,31 @@
+func BinaryFindMin(l, r int, nums []int) int {
+    if (l == r) {
+        return l
+    } else if (l > r) {
+        return -1
+    }
+
+    // 判断区间类型
+    if (nums[l] < nums[r]) {
+        // 递增类型
+        return l
+    } else {
+        // 旋转类型
+        mid := (l + r) / 2
+        t := mid
+        t2 := BinaryFindMin(l, mid-1, nums)
+        if t2 != -1 && nums[t] > nums[t2] {
+            t = t2
+        }
+
+        t2 = BinaryFindMin(mid+1, r, nums)
+        if t2 != -1 && nums[t] > nums[t2] {
+            t = t2
+        }
+        return t
+    }
+}
+
+func findMin(nums []int) int {
+    return nums[BinaryFindMin(0, len(nums)-1, nums)]
+}