We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Python
  3. Collections
  4. DefaultDict Tutorial
  5. Discussions

DefaultDict Tutorial

  • CarsonReidDavis
     + 33 comments

    A lot of people seem to be having trouble with this challege so I thought I would post my working code. Any suggestions for improvement are welcome!

    from collections import defaultdict
d = defaultdict(list)
list1=[]

n, m = map(int,raw_input().split())

for i in range(0,n):
    d[raw_input()].append(i+1) 

for i in range(0,m):
    list1=list1+[raw_input()]  

for i in list1: 
    if i in d:
        print " ".join( map(str,d[i]) )
    else:
        print -1