diff options
| -rw-r--r-- | challenge-074/walt-mankowski/python/ch-2.py | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/challenge-074/walt-mankowski/python/ch-2.py b/challenge-074/walt-mankowski/python/ch-2.py index 1c1d4e1609..e80b5b0246 100644 --- a/challenge-074/walt-mankowski/python/ch-2.py +++ b/challenge-074/walt-mankowski/python/ch-2.py @@ -1,7 +1,7 @@ from sys import argv s = argv[1] -seen = set() +seen = {} nr = [] out = [] @@ -9,11 +9,13 @@ for c in s: # have we seen c before? if c not in seen: # add c to nr - seen.add(c) + seen[c] = True nr.append(c) else: # remove c from nr - nr.remove(c) + if seen[c]: + nr.remove(c) + seen[c] = False # now the FNR is either the last element of nr, or # out.append(nr[-1] if nr else '#') |