Weighted Starfield
by sealldev
🚩 CTFs HackTheBox University CTF 2024 coding
Weighted Starfield / HackTheBox University CTF 2024

Original Writeup on seall.dev
Input:
signals = [1, -2, 3, -4]
weights = [2, 3, -1, 4]
Output:
48
Explanation:
To compute the maximum stability score, follow these steps:
Calculate the modified signals:
1 × 2 = 2
-2 × 3 = -6
3 × -1 = -3
-4 × 4 = -16
The modified signals are:
[2, -6, -3, -16]
Find the maximum product of any contiguous subarray:
Subarray
[2] : Product = 2
Subarray
[-6] : Product = -6
Subarray
[2, -6] : Product = -12
Subarray
[-3, -16] : Product = 48
The maximum product is 48, which occurs for the subarray
[-3, -16]
# Input two arrays as strings
from json import loads
signals = loads(input()) # First input array as a string
weights = loads(input()) # Second input array as a string
# Write your solution below and make sure to print the maximum stability score
mod = []
for i in range(len(signals)):
mod.append(signals[i] * weights[i])
max_so_far = mod[0]
max_ending_here = mod[0]
min_ending_here = mod[0]
for i in range(1, len(mod)):
temp_max = max(mod[i], max_ending_here * mod[i], min_ending_here * mod[i])
min_ending_here = min(mod[i], max_ending_here * mod[i], min_ending_here * mod[i])
max_ending_here = temp_max
max_so_far = max(max_so_far, max_ending_here)
print(max_so_far)
Flag: HTB{m1ssi0n_c0mpl3t3d_m4x1mum_5t4b1l1ty_4ch13v3d!_33e248007c13d87012bb14a5f21957c8}
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