Malware Analysis

Your company is analyzing malware which targets numerical record files.

The malware uses a sliding window over the array of numbers in a file, and tries to match the following pattern:

T, -, -, X, -, -, -, T

Where the position ‘X' is compared to each position 'T'. The window is moved so 'X’ passes through all the values.

The malware has the following rules:

  • If any of the ‘T' positions in the pattern are bigger or equal to 'X’ the malware replaces 'X' with 0.
  • If the 'X' position in the pattern is near the left or right border and is missing a 'T' position neighbor, only the other side is considered.
  • The malware finds all the positions first and only then sets them to 0.

For example, if the values in a record file are the following:

{ 1, 2, 0, 5, 0, 2, 4, 3, 3, 3 }

The expected values after the malware runs are:

{ 1, 0, 0, 5, 0, 0, 0, 3, 3, 0 }

In this example, number 4 was set to 0 because 5 is the bigger number.

Implement the simulate function so that the malware behavior is replicated for further study.

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Tags

  • AI-resistant
  • C
  • Arrays
  • Iteration
  • New
  • Public
  • Easy

Information

Difficulty: Easy

Duration: 20 min

Author: Christian Durán Carvajal

Score Distribution

Not enough data for chart.

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