create 0016-3sum-closest.go

Author: Youssef Eddaif

go/0016-3sum-closest.go

@@ -0,0 +1,36 @@
+package threeSumClosest
+
+import (
+	"math"
+	"sort"
+)
+
+func threeSumClosest(nums []int, target int) int {
+	Length := len(nums)
+	// Sort given array of numbers
+	sort.Ints(nums)
+	var left, right, sum, diff, result int
+	min := math.MaxInt
+	for i := 0; i < Length-2; i++ {
+		left = i + 1
+		right = Length - 1
+		for left < right {
+			sum = nums[left] + nums[right] + nums[i]
+			// Calculate the distance between the target and sum
+			diff = int(math.Abs(float64(target - sum)))
+			if sum < target {
+				left++
+			} else if sum > target {
+				right--
+			} else {
+				return sum
+			}
+			// Check for smallest distance from the target
+			if diff < min {
+				min = diff
+				result = sum
+			}
+		}
+	}
+	return result
+}