def read_problems():
global problems
problems = {}
with open('problems.json') as problems_file:
list = jsons.loads(problems_file.read())
for problem_name in list:
problems[problem_name] = Problem()
problems[problem_name].details = list[problem_name]['details']
problems[problem_name].cases = {}
for input in list[problem_name]['cases']:
problems[problem_name].cases[input] = (
list[problem_name]['cases'][input])
