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

  • jackmaney
     + 0 comments

    I fail to see the utility of defaultdicts for this problem. List comprehensions provide, IMO, more readable code:

    n, m = [int(x.strip()) for x in input().split()]

a = [input().strip() for _ in range(n)]

b = [input().strip() for _ in range(m)]

for w in b:
    indices = [i+1 for i, x in enumerate(a) if x == w]
    if indices:
        print(*indices)
    else:
        print(-1)