add new solutions

solutions/12/q1268/solution.go

@@ -0,0 +1,38 @@
+package q1268
+
+import "slices"
+
+func prefixSearch(products []string, prefix string) []string {
+	ret := make([]string, 0, 3)
+	pfLen := len(prefix)
+
+	l, r := 0, len(products)
+	for l < r {
+		m := (l + r) / 2
+		if products[m][:min(len(products[m]), pfLen)] >= prefix {
+			r = m
+		} else {
+			l = m + 1
+		}
+	}
+	for ; l < len(products) && len(products[l]) >= pfLen && products[l][:pfLen] == prefix; l++ {
+		ret = append(ret, products[l])
+		if len(ret) == 3 {
+			break
+		}
+	}
+
+	return ret
+}
+
+func suggestedProducts(products []string, searchWord string) [][]string {
+	slices.Sort(products)
+	ret := make([][]string, 0, len(searchWord))
+
+	for i := range len(searchWord) {
+		ret = append(ret, prefixSearch(products, searchWord[:i+1]))
+	}
+	return ret
+}
+
+var _ = suggestedProducts