Create array-of-doubled-pairs.go

Author: izharishaksa

array-of-doubled-pairs.go

@@ -0,0 +1,43 @@
+//https://leetcode.com/problems/array-of-doubled-pairs/
+
+package leetcode_solutions_golang
+
+import "sort"
+
+func canReorderDoubled(arr []int) bool {
+	count := make(map[int]int)
+	for _, i := range arr {
+		count[i]++
+	}
+
+	keys := make([]int, 0)
+	for key, _ := range count {
+		keys = append(keys, key)
+	}
+
+	sort.Ints(keys)
+	for i := 0; i < len(keys); i++ {
+		full := keys[i] * 2
+		half := keys[i]
+		countFull, isOk1 := count[full]
+		countHalf, isOk2 := count[half]
+		if !isOk1 || !isOk2 {
+			continue
+		}
+		if countFull >= countHalf {
+			count[full] -= countHalf
+			count[half] -= countFull
+		} else {
+			count[half] -= countFull
+			count[full] -= countHalf
+		}
+	}
+
+	for i := 0; i < len(keys); i++ {
+		if count[keys[i]] > 0 {
+			return false
+		}
+	}
+
+	return true
+}