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First solution in Clear category for Call to Home by gm86xx
from itertools import groupby
def total_cost(calls):
# group by day
g = groupby((x.split() for x in calls), key=lambda x:x[0])
# minutes for each day
m = (sum((int(y[2])+59)//60 for y in x) for _,x in g)
# total cost
return sum(x if x < 100 else 2*x-100 for x in m)
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert total_cost(("2014-01-01 01:12:13 181",
"2014-01-02 20:11:10 600",
"2014-01-03 01:12:13 6009",
"2014-01-03 12:13:55 200")) == 124, "Base example"
assert total_cost(("2014-02-05 01:00:00 1",
"2014-02-05 02:00:00 1",
"2014-02-05 03:00:00 1",
"2014-02-05 04:00:00 1")) == 4, "Short calls but money..."
assert total_cost(("2014-02-05 01:00:00 60",
"2014-02-05 02:00:00 60",
"2014-02-05 03:00:00 60",
"2014-02-05 04:00:00 6000")) == 106, "Precise calls"
Sept. 30, 2018