Python: Find the number which when appended to the list makes the total 0
Python Programming Puzzles: Exercise-61 with Solution
Write a Python program to find the number which when appended to the list makes the total 0.
Input: [1, 2, 3, 4, 5] Output: -15 Input: [-1, -2, -3, -4, 5] Output: 5 Input: [10, 42, 17, 9, 1315182, 184, 102, 29, 15, 39, 755] Output: -1316384
Pictorial Presentation:

Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums):
dset = set(nums)
result = sum(nums)
dmin = abs(min(nums) - sum(dset^set(nums)))
for d in dset^set(nums):
dcopy = list(nums)
dcopy.append(d)
ds = sum(dcopy)
if 0-ds < dmin:
result = ds
dmin = abs(ds)
elif 0-ds == dmin:
result = min(result, ds)
return result*(-1)
nums = [1, 2, 3, 4, 5]
print("Original list of numbers:")
print(nums)
print("Number which when appended to the list makes the total 0:")
print(test(nums))
nums = [-1, -2, -3, -4, 5]
print("\nOriginal list of numbers:")
print(nums)
print("Number which when appended to the list makes the total 0:")
print(test(nums))
nums = [10, 42, 17, 9, 1315182, 184, 102, 29, 15, 39, 755]
print("\nOriginal list of numbers:")
print(nums)
print("Number which when appended to the list makes the total 0:")
print(test(nums))
Sample Output:
Original list of numbers: [1, 2, 3, 4, 5] Number which when appended to the list makes the total 0: -15 Original list of numbers: [-1, -2, -3, -4, 5] Number which when appended to the list makes the total 0: 5 Original list of numbers: [10, 42, 17, 9, 1315182, 184, 102, 29, 15, 39, 755] Number which when appended to the list makes the total 0: -1316384
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Python: Tips of the Day
Clamps num within the inclusive range specified by the boundary values x and y:
Example:
def tips_clamp_num(num,x,y): return max(min(num, max(x, y)), min(x, y)) print(tips_clamp_num(2, 4, 6)) print(tips_clamp_num(1, -1, -6))
Output:
4 -1
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