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  1. Prepare
  2. Python
  3. Collections
  4. DefaultDict Tutorial
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DefaultDict Tutorial

  • readyready15728
     + 7 comments

    Not bad but your version doesn't run. This one does:

    from collections import defaultdict
d = defaultdict(list)
n, m = list(map(int, raw_input().split()))

for i in range(n):
    d[raw_input()].append(i + 1)

for i in range(m):
    print(' '.join(map(str, d[raw_input()])) or -1)