package largestperimeter

import (
	"sort"
)

func isTriangle(a, b, c int) bool {
	return a < b+c
}

func largestPerimeter(nums []int) int {
	sort.Ints(nums)

	for i := len(nums) - 1; i >= 2; i-- {
		a, b, c := nums[i], nums[i-1], nums[i-2]
		if isTriangle(a, b, c) {
			return a + b + c
		}
	}

	return 0
}

func Triangle(nums []int) int {
	return largestPerimeter(nums)
}