# Datetime (ppc 100)
###ENG[PL](#pl-version)
In the task we a lot of [messages](messages.zip).Each message has a timestamp in the format `Friday_1_April_2015` and contains some random hash value.The flag is one of those hashes and we have to find the right one.The point is to find the message with correct timestamp - where day of the week matches the designated date.We do this with a simple python script and datetime library:
```pythonimport codecsimport osimport datetime
def main():    basedir = "/tmp/messages"    days = ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"]    months = ["", "january", "february", "march", "april", "may", "june", "july", "august", "september", "october",              "november", "december"]    for filename in os.listdir(basedir):        x = filename.split("_")        dayname = x[0]        dayno = x[1]        month = months.index(x[2].lower())        year = x[3][:-4]        date = datetime.datetime(int(year), int(month), int(dayno))        if date.weekday() == days.index(dayname.lower()):            print(filename)            with codecs.open(basedir + "/" + filename, "r") as input_file:                data = input_file.read()                print(data)
main()```
Which gives us:
```Tuesday_15_June_1982.txt4eec2cd9e4bb0062d0e41c8af1bd8a0f```
###PL version
W zadaniu dostajemy dużo [wiadomości](messages.zip).Każda wiadomość ma znacznik czasu w postaci `Friday_1_April_2015` i zawiera losowy hashcode.Flaga jest jednym z tych hashy i musimy znaleźć odpowiedni.Idea zadania jest dość prosta - tylko jeden znacznik czasowy jest poprawny, tzn dzień tygodnia zgadza się z datą.Poprawny plik odnajdujemy za pomocą skryptu i biblioteki datetime:
```pythonimport codecsimport osimport datetime
def main():    basedir = "/tmp/messages"    days = ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"]    months = ["", "january", "february", "march", "april", "may", "june", "july", "august", "september", "october",              "november", "december"]    for filename in os.listdir(basedir):        x = filename.split("_")        dayname = x[0]        dayno = x[1]        month = months.index(x[2].lower())        year = x[3][:-4]        date = datetime.datetime(int(year), int(month), int(dayno))        if date.weekday() == days.index(dayname.lower()):            print(filename)            with codecs.open(basedir + "/" + filename, "r") as input_file:                data = input_file.read()                print(data)
main()```
Co daje nam:
```Tuesday_15_June_1982.txt4eec2cd9e4bb0062d0e41c8af1bd8a0f```