diff --git a/go/blind_75/arrays_&_hashing/1-Two-Sum.go b/go/blind_75/arrays_&_hashing/1-Two-Sum.go
new file mode 100644
index 000000000..0d8c0ca30
--- /dev/null
+++ b/go/blind_75/arrays_&_hashing/1-Two-Sum.go
@@ -0,0 +1,14 @@
+package arrayandhashing
+
+func twoSum(nums []int, target int) []int {
+	m := make(map[int]int)
+	for idx, num := range nums {
+
+		if val, found := m[target-num]; found {
+			return []int{val, idx}
+		}
+
+		m[num] = idx
+	}
+	return nil
+}
diff --git a/go/blind75/arrayAndHashing/217_containsDuplicate.go b/go/blind_75/arrays_&_hashing/217-Contains-Duplicate.go
similarity index 100%
rename from go/blind75/arrayAndHashing/217_containsDuplicate.go
rename to go/blind_75/arrays_&_hashing/217-Contains-Duplicate.go