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  1. Prepare
  2. Python
  3. Sets
  4. Set .discard(), .remove() & .pop()
  5. Discussions

Set .discard(), .remove() & .pop()

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recency

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1099 Discussions

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  • jakub_szymanski1
     + 0 comments
    n = int(input())
s = set(map(int, input().split()))
N = int(input())
for _ in range(N):
    inp = input()
    try:
        if inp == 'pop':
            s.pop()
        else:
            command, number = inp.split()
            if command == 'remove':
                s.remove(int(number))
            if command == 'discard':
                s.discard(int(number))
    except KeyError:
        continue

print(sum(s))

  • jpconcerman
     + 0 comments

    n = int(input()) s = set(map(int, input().split())) ctr = int(input())

    for _ in range(ctr): actions = input().split() method = getattr(s, actions[0])

    if len(actions) == 1:
    method()
else:
    method(int(actions[1]))

    print(sum(s))

  • cenkmyetis1
     + 0 comments

    if name == 'main': n = int(input()) myset = set(map(int,input().split())) N = int(input())
    for _ in range(N): cmd, *args = input().split() getattr(myset,cmd)(*map(int,args)) print(sum(myset))

  • dlhorowitz
     + 0 comments

    If pop() removes an arbitrary item from the set, how can the answer be determinative?

  • hippophantez
     + 0 comments

    set.pop is meh, so convert to list and pop consistently

    n = input()
s = set(map(int, input().split()))
for i in range(int(input())):
    c = input().split()
    if c[0] == 'pop':
        s_list = list(s)
        s_list.pop(0)
        s = set(s_list)
    elif c[0] == 'remove':
        s.remove(int(c[1]))
    else:
        s.discard(int(c[1]))
print(sum(s))