我的解法

lc747. Largest Number At Least Twice of Others.py

@@ -0,0 +1,25 @@
+class Solution:
+    def dominantIndex(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: int
+        """
+        maxnum = nums[0]
+        secmax = 0
+        result = True
+        idx = 0
+        for i in range(1, len(nums)):
+            if nums[i] > maxnum:
+                idx = i
+                secmax = maxnum
+                maxnum = nums[i]
+                result = (maxnum >= 2 * secmax)
+            else:
+                if maxnum < 2 * nums[i]:
+                    result = False
+        return idx if result else -1
+
+
+nums = [1, 2, 3, 4]
+s = Solution()
+print(s.dominantIndex(nums))