timeconversion.go

package main

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "strings"
    "strconv"
)

/*
 * Complete the timeConversion function below.
 */
func timeConversion(s string) string {
    var militaryHour int
    var formatedHour string

    std := s[len(s)-2:]

    splitTime := strings.Split(s[:len(s)-2], ":")

    hour, _ := strconv.Atoi(splitTime[0])

    if std == "PM" {
        if hour == 12 {
            militaryHour = hour
        } else {
            militaryHour = hour + 12
        }
    } else {
        if hour == 12 {
            militaryHour = 00
        } else {
            militaryHour = hour
        }
    }

    formatedHour = fmt.Sprintf("%02d", militaryHour)

    time := fmt.Sprint(formatedHour, ":", splitTime[1], ":", splitTime[2])

    return time

}

func main() {
    reader := bufio.NewReaderSize(os.Stdin, 1024 * 1024)

    outputFile, err := os.Create(os.Getenv("OUTPUT_PATH"))
    checkError(err)

    defer outputFile.Close()

    writer := bufio.NewWriterSize(outputFile, 1024 * 1024)

    s := readLine(reader)

    result := timeConversion(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)
    }
}