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  1. Prepare
  2. Python
  3. Collections
  4. collections.Counter()
  5. Discussions

collections.Counter()

  • foxboyseraphim
     + 0 comments

    Completed using the methods in the documentation:

    import collections

X = int(input())
c = collections.Counter(map(int, input().split()))
N = int(input())
total = 0
for i in range(N):
    s,p = map(int, input().split())
    if c[s]:
        c.subtract([s])
        c += collections.Counter() # This removes any 0 counts, as mentioned in documentation
        total += p
print(total)