Create LargestPerimeterTriangle.java

src/codingquestions/leetcode/LargestPerimeterTriangle.java

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+/*
+976. Largest Perimeter Triangle
+Solved
+Easy
+Topics
+premium lock icon
+Companies
+Given an integer array nums, return the largest perimeter of a triangle with a non-zero area, formed from three of these lengths. If it is impossible to form any triangle of a non-zero area, return 0.
+
+
+
+Example 1:
+
+Input: nums = [2,1,2]
+Output: 5
+Explanation: You can form a triangle with three side lengths: 1, 2, and 2.
+Example 2:
+
+Input: nums = [1,2,1,10]
+Output: 0
+Explanation: 
+You cannot use the side lengths 1, 1, and 2 to form a triangle.
+You cannot use the side lengths 1, 1, and 10 to form a triangle.
+You cannot use the side lengths 1, 2, and 10 to form a triangle.
+As we cannot use any three side lengths to form a triangle of non-zero area, we return 0.
+
+
+Constraints:
+
+3 <= nums.length <= 104
+1 <= nums[i] <= 106
+*/
+class Solution {
+    public int largestPerimeter(int[] nums) {
+        Arrays.sort(nums);
+        for(int i = nums.length - 3; i >= 0; i--){
+            if(nums[i] + nums[i + 1] > nums[i + 2])
+                return nums[i] + nums[i + 1] + nums[i + 2];
+        }
+        return 0;
+    }
+}