add new solutions

solutions/13/q1304/solution.go

@@ -0,0 +1,12 @@
+package q1304
+
+func sumZero(n int) []int {
+	ret := make([]int, n)
+	for i := range n / 2 {
+		ret[i*2] = i + 1
+		ret[i*2+1] = -i - 1
+	}
+	return ret
+}
+
+var _ = sumZero

solutions/13/q1317/solution.go

@@ -0,0 +1,25 @@
+package q1317
+
+func noZero(n int) bool {
+	for ; n > 0; n /= 10 {
+		if n%10 == 0 {
+			return false
+		}
+	}
+	return true
+}
+
+func getNoZeroIntegers(n int) []int {
+	for i := 1; i <= n/2; i++ {
+		if !noZero(i) {
+			continue
+		}
+		j := n - i
+		if noZero(j) {
+			return []int{i, j}
+		}
+	}
+	return nil
+}
+
+var _ = getNoZeroIntegers