getminSum.py
· 1.1 KiB · Python
Неформатований
def getMinimumSum(arr):
n = len(arr)
if n < 3:
return -1
left_min = [None] * n
min_so_far = float('inf')
# Populate left_min
for j in range(n):
if min_so_far < arr[j]:
left_min[j] = min_so_far
else:
left_min[j] = None
if arr[j] < min_so_far:
min_so_far = arr[j]
right_min = [None] * n
min_so_far = float('inf')
# Populate right_min
for j in range(n-1, -1, -1):
if min_so_far < arr[j]:
right_min[j] = min_so_far
else:
right_min[j] = None
if arr[j] < min_so_far:
min_so_far = arr[j]
min_sum = float('inf')
for j in range(n):
if left_min[j] is not None and right_min[j] is not None:
current_sum = left_min[j] + arr[j] + right_min[j]
if current_sum < min_sum:
min_sum = current_sum
return min_sum if min_sum != float('inf') else -1
# Example Usage:
if __name__ == "__main__":
arr = [3, 4, 5, 1, 2, 3, 1]
result = getMinimumSum(arr)
print(result) # Output: 4
1 | |
2 | def getMinimumSum(arr): |
3 | n = len(arr) |
4 | if n < 3: |
5 | return -1 |
6 | |
7 | left_min = [None] * n |
8 | min_so_far = float('inf') |
9 | |
10 | # Populate left_min |
11 | for j in range(n): |
12 | if min_so_far < arr[j]: |
13 | left_min[j] = min_so_far |
14 | else: |
15 | left_min[j] = None |
16 | if arr[j] < min_so_far: |
17 | min_so_far = arr[j] |
18 | |
19 | right_min = [None] * n |
20 | min_so_far = float('inf') |
21 | |
22 | # Populate right_min |
23 | for j in range(n-1, -1, -1): |
24 | if min_so_far < arr[j]: |
25 | right_min[j] = min_so_far |
26 | else: |
27 | right_min[j] = None |
28 | if arr[j] < min_so_far: |
29 | min_so_far = arr[j] |
30 | |
31 | min_sum = float('inf') |
32 | for j in range(n): |
33 | if left_min[j] is not None and right_min[j] is not None: |
34 | current_sum = left_min[j] + arr[j] + right_min[j] |
35 | if current_sum < min_sum: |
36 | min_sum = current_sum |
37 | |
38 | return min_sum if min_sum != float('inf') else -1 |
39 | |
40 | # Example Usage: |
41 | if __name__ == "__main__": |
42 | arr = [3, 4, 5, 1, 2, 3, 1] |
43 | result = getMinimumSum(arr) |
44 | print(result) # Output: 4 |
45 | |
46 |
sumof_factors.py
· 511 B · Python
Неформатований
def sum_of_factors(num):
# Sum of factors of num
sum_factors = 0
for i in range(1, int(num**0.5) + 1):
if num % i == 0:
sum_factors += i
if i != num // i:
sum_factors += num // i
return sum_factors
def maxSubsetSum(arr):
# Apply sum_of_factors to each element in arr
return [sum_of_factors(num) for num in arr]
# Example usage:
arr = [12] # Example input from the image
result = maxSubsetSum(arr)
print(result) # Expected output: [28]
1 | def sum_of_factors(num): |
2 | # Sum of factors of num |
3 | sum_factors = 0 |
4 | for i in range(1, int(num**0.5) + 1): |
5 | if num % i == 0: |
6 | sum_factors += i |
7 | if i != num // i: |
8 | sum_factors += num // i |
9 | return sum_factors |
10 | |
11 | def maxSubsetSum(arr): |
12 | # Apply sum_of_factors to each element in arr |
13 | return [sum_of_factors(num) for num in arr] |
14 | |
15 | # Example usage: |
16 | arr = [12] # Example input from the image |
17 | result = maxSubsetSum(arr) |
18 | print(result) # Expected output: [28] |
19 |