add new solutions

solutions/14/q1470/solution.go

@@ -0,0 +1,14 @@
+package q1470
+
+func shuffle(nums []int, n int) []int {
+	ret := make([]int, n*2)
+	for i, num := range nums[:n] {
+		ret[i*2] = num
+	}
+	for i, num := range nums[n : n*2] {
+		ret[i*2+1] = num
+	}
+	return ret
+}
+
+var _ = shuffle