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  2. Python
  3. Sets
  4. Set Mutations
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Set Mutations

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851 Discussions

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  • SVVBathini_w
     + 0 comments

    For Python3 Platform

    n_A = int(input())
A = set(map(int, input().split()))
N = int(input())
for _ in range(N):
    cmd, len = input().split()
    B = set(map(int, input().split()))
    
    if(cmd == "intersection_update"):
        A.intersection_update(B)
    elif(cmd == "update"):
        A |= B
    elif(cmd == "difference_update"):
        A.difference_update(B)
    elif(cmd == "symmetric_difference_update"):
        A ^= B

print(sum(A))

  • dheenupriya2001
     + 0 comments
    n = int(input())
arr1 = set(map(int, input().split()))
m = int(input())
for _ in range(m):
    key, value = input().split()
    arr2 = set(map(int, input().split()))
    getattr(arr1, key)(arr2)
print(sum(arr1))

  • patilprathames25
     + 0 comments

    number_element = int(input()) number_element_spaced = set(map(int, input().split())) numbers_of_other_sets = int(input())

    for _ in range(numbers_of_other_sets): operations , no_elements = input().split() other_sets = set(map(int, input().split())) getattr(number_element_spaced,operations)(other_sets)

    print(sum(number_element_spaced))

  • jondornback
     + 0 comments

    Since the commands are the exact name of the method calls on the Set you can use python's getattr function as shown below. NOTE - do not do this in production code unless you are guaranteed that the method calls are correct!!

    input() # throwaway
A = set(map(int, input().split()))

N = int(input())

for _ in range(N):
    cmd = input().split() #throwaway cmd[1]
    s = set(map(int, input().split()))
    # get the cmd[0] method from A and call with param s
    getattr(A,cmd[0])(s)
    
print(sum(A))

  • dilajevolves
     + 0 comments
    _,A = int(input()),set(map(int,input().split()))
operations = {
    "update" : A.update,
    "intersection_update" : A.intersection_update,
    "difference_update" : A.difference_update,
    "symmetric_difference_update" : A.symmetric_difference_update
}
for _ in range(int(input())):
    opr = input().split()[0]
    B = set(map(int,input().split()))
    operations[opr](B)
print(sum(A))