chore: add hackerrank solutions

hacker-rank/pangrams/main.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+    "bufio"
+    "fmt"
+    "io"
+    "os"
+    "strings"
+)
+
+/*
+ * Complete the 'pangrams' function below.
+ *
+ * The function is expected to return a STRING.
+ * The function accepts STRING s as parameter.
+ */
+
+func pangrams(s string) string {
+    // Write your code here
+    s = strings.ToLower(s)
+
+    m := make(map[rune]struct{}, 26)
+    for _, a := range s {
+        if a >= 'a' && a <= 'z' {
+            fmt.Println(a)
+            m[a] = struct{}{}
+        }
+    }
+    fmt.Println(len(m))
+    if len(m) == 26 {
+        return "pangram"
+    } else {
+        return "not pangram"
+    }
+}
+
+func main() {
+    reader := bufio.NewReaderSize(os.Stdin, 16 * 1024 * 1024)
+
+    stdout, err := os.Create(os.Getenv("OUTPUT_PATH"))
+    checkError(err)
+
+    defer stdout.Close()
+
+    writer := bufio.NewWriterSize(stdout, 16 * 1024 * 1024)
+
+    s := readLine(reader)
+
+    result := pangrams(s)
+
+    fmt.Fprintf(writer, "%s\n", result)
+
+    writer.Flush()
+}
+
+func readLine(reader *bufio.Reader) string {
+    str, _, err := reader.ReadLine()
+    if err == io.EOF {
+        return ""
+    }
+
+    return strings.TrimRight(string(str), "\r\n")
+}
+
+func checkError(err error) {
+    if err != nil {
+        panic(err)
+    }
+}