solves largest number at least twice of each other

Author: anishLearnsToCode

README.md

@@ -1,8 +1,8 @@
 # LeetCode Algorithms
 
-![problems-solved](https://img.shields.io/badge/Problems%20Solved-181/2081-1f425f.svg)
-![problems-solved-java](https://img.shields.io/badge/Java-181/2081-1abc9c.svg)
-![problems-solved-python](https://img.shields.io/badge/Python-181/2081-1abc9c.svg)
+![problems-solved](https://img.shields.io/badge/Problems%20Solved-182/2081-1f425f.svg)
+![problems-solved-java](https://img.shields.io/badge/Java-182/2081-1abc9c.svg)
+![problems-solved-python](https://img.shields.io/badge/Python-182/2081-1abc9c.svg)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](CONTRIBUTING.md)
 [![cp](https://img.shields.io/badge/also%20see-Competitve%20Programming-1f72ff.svg)](https://github.com/anishLearnsToCode/competitive-programming)
 
@@ -205,7 +205,7 @@
 | 734 | [Sentence Similarity](https://leetcode.com/problems/sentence-similarity) | |
 | 744 | [Find Smallest Letter Greater Than Target](https://leetcode.com/problems/find-smallest-letter-greater-than-target) | [![Java](assets/java.png)](src/FindSmallestLetterGreaterThanTarget.java) [![Python](assets/python.png)](python/find_smallest_letter_greater_than.py) |
 | 746 | [Min Cost Climbing Stairs](https://leetcode.com/problems/min-cost-climbing-stairs) | [![Java](assets/java.png)](src/MinCostClimbingStairs.java) [![Python](assets/python.png)](python/min_cost_climbing_stairs.py) |
-| 747 | [Largest Number at least twize of Others](https://leetcode.com/problems/largest-number-at-least-twice-of-others) | |
+| 747 | [Largest Number at least twize of Others](https://leetcode.com/problems/largest-number-at-least-twice-of-others) | [![Java](assets/java.png)](src/LargestNumberAtLeastTwiceOfOthers.java) [![Python](assets/python.png)](python/largest_number_at_least_twice_of_others.py) |
 | 748 | [Shortest Completing Word](https://leetcode.com/problems/shortest-completing-word) | |
 | 758 | [Bold Words in String](https://leetcode.com/problems/bold-words-in-string) | |
 | 760 | [Find Anagram Mappings](https://leetcode.com/problems/find-anagram-mappings) | |

python/largest_number_at_least_twice_of_others.py

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+from typing import List, Tuple
+
+
+class Solution:
+    def dominantIndex(self, nums: List[int]) -> int:
+        largest, largestIndex = self.getMax(nums)
+        for number in nums:
+            if number != largest and 2 * number > largest:
+                return -1
+        return largestIndex
+
+    def getMax(self, array: List[int]) -> Tuple[int, int]:
+        largest, largestIndex = -float('inf'), -1
+        for index, element in enumerate(array):
+            if element > largest:
+                largest = element
+                largestIndex = index
+        return largest, largestIndex

src/LargestNumberAtLeastTwiceOfOthers.java

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+public class LargestNumberAtLeastTwiceOfOthers {
+    public int dominantIndex(int[] nums) {
+        int largestIndex = largestIndex(nums), largest = nums[largestIndex];
+        for (int number : nums) {
+            if (number != largest && 2 * number > largest) {
+                return -1;
+            }
+        }
+        return largestIndex;
+    }
+
+    private int largestIndex(int[] array) {
+        int largest = Integer.MIN_VALUE, largestIndex = -1;
+        for (int index = 0 ; index < array.length ; index++) {
+            if (array[index] > largest) {
+                largest = array[index];
+                largestIndex = index;
+            }
+        }
+        return largestIndex;
+    }
+}