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# Untitled

a guest Oct 11th, 2018 70 Never
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1. import itertools
2. from collections import defaultdict
3. from bisect import bisect_left
4.
5. z_real = float(input("Enter real part of number: "))
6. z_imag = float(input("Enter imaginary part of number: "))
7. goal = complex(z_real, z_imag)
8. print("Number: {}".format(goal))
9. print("Now enter the set of complex numbers to choose from")
10. choices = []
11. while True:
12.     c_real = 0
13.
14.     try:
15.         c_real = float(input("Enter the real part (or any non-number to continue): "))
16.     except BaseException:
17.         break
18.
19.     c_imag = float(input("Enter imaginary part: "))
20.
21.     choices.append(complex(c_real, c_imag))
22.
23.
24. def findSums(z, choice):
25.     choice.sort(key=lambda z_: z_.imag)
26.     choice.sort(key=lambda z_: z_.real)
27.     reals = map(lambda z_: z_.real, choice)
28.     imags = map(lambda z_: z_.imag, choice)
29.
30.     sums = defaultdict(list)
31.
32.     for length in range(len(choices) + 1):
33.         for subset in itertools.combinations(choices, length):
34.             search = z - sum(subset)
35.             pos = bisect_left(reals, search.real)
36.             if pos < len(reals) and reals[pos] == search.real:
37.                 loc = bisect_left(imags, search.imag)
38.                 if loc < len(imags) and imags[loc] == search.imag:
39.                     sums[length] += list(subset) + [search]
40.     return sums
41.
42.
43. print(findSums(goal, choices))
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