HackerRank

So fun! It connects algorithm(regex) with real world usages!

So basically speaking, C:pointer syntax, #includescanf ypedef; Java: importpublic class syntax ry-catch syntax; Python: def syntaxspecial print syntax.

And BTW, if you are working on regex problems with Python, this is god-sent: http://pythex.org/

import re

import io
import sys
input_stream = io.TextIOWrapper(sys.stdin.buffer, encoding='utf-8')

s = input_stream.readlines()
s = "
".join(s)

pc = '([^/]*[a-zA-Z]+w*|typedef|#include|scanf)'
pj = '(imports+|publics+class|catchs*[(].*?[)]|System.)'
pp = '(prints+[w"]+|[(][[]["sw,]+[]][)]|defs+[w]+[(])'

mc = re.findall(pc, s)
mj = re.findall(pj, s)
mp = re.findall(pp, s)

bc = len(mc) > 0
bj = len(mj) > 0
bp = len(mp) > 0
if bc:
    print ("C")
if bj:
    print ("Java")
if bp:
    print ("Python")