diff options
| -rwxr-xr-x | challenge-117/steven-wilson/python/ch-1.py | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/challenge-117/steven-wilson/python/ch-1.py b/challenge-117/steven-wilson/python/ch-1.py index a3870ba254..9978605acd 100755 --- a/challenge-117/steven-wilson/python/ch-1.py +++ b/challenge-117/steven-wilson/python/ch-1.py @@ -7,11 +7,18 @@ if __name__ == "__main__": file = open(filename) lines = file.readlines() line_numbers = [int(line.split(',')[0]) for line in lines] - line_numbers.sort() - number = 1 - for line_number in line_numbers: - if number != line_number: - break - else: - number += 1 + # Math method + sum_of_line_numbers = sum(line_numbers) + sum_of_range = sum(range(1, (len(line_numbers) + 2))) + number = sum_of_range - sum_of_line_numbers + + # Iterative method +# line_numbers.sort() +# number = 1 +# for line_number in line_numbers: +# if number != line_number: +# break +# else: +# number += 1 + print("The missing row number is %d" % number)
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