Problem 1

main.go

@@ -0,0 +1,7 @@
+package main
+
+import "log"
+
+func main() {
+	log.Println(problem1(16, []int{10, 15, 3, 7}))
+}

problem1.go

@@ -0,0 +1,18 @@
+package main
+
+func problem1(val int, nums []int) bool {
+	if len(nums) == 0 {
+		return false
+	}
+
+	comp := make(map[int]struct{})
+
+	for _, num := range nums {
+		if _, ok := comp[val-num]; ok {
+			return true
+		}
+		comp[num] = struct{}{}
+	}
+
+	return false
+}