Source code
public class Main {
public static void main(String[] args) {
int[] sequence = new int[251];
sequence[0] = 0;
for (int i = 1; i <= 250; i++) {
sequence[i] = sequence[i - 1] - i;
if (sequence[i] <= 0 || contains(sequence, sequence[i], i - 1)) {
sequence[i] = sequence[i - 1] + i;
}
System.out.println(sequence[i]);
}
}
public static boolean contains(int[] sequence, int value, int endIndex) {
for (int i = 0; i < endIndex; i++) {
if (sequence[i] == value) {
return true;
}
}
return false;
}
}
Run 1
The code is logically structured into a main method and a helper 'contains' method, which aids readability. Nesting is minimal, with only one level inside the loop and helper method. The intent—generating a sequence with non-positive or duplicate checks—is fairly clear, though variable names like 'sequence' could be more descriptive. Code length is concise for the algorithm. Action granularity is good: each line handles a single step (assignment, condition, print). Reading flow is natural, moving from initialization to generation to output. Minor deductions: the hardcoded array size and magic number 250 reduce flexibility and clarity. The 'contains' method could use a clearer name like 'containsValueUpTo'. Overall, the code is straightforward and easy to follow.
Run 2
The code is fairly straightforward but has several readability issues. The structure is simple, with a main method and a helper method, but the algorithm's intent is unclear from variable names like 'sequence' and magic numbers like 250 and 251. Nesting is minimal, which is good, but the conditional logic for updating sequence[i] could be clearer. The contains method is named well but accepts parameters that make its purpose slightly ambiguous. Action granularity is mostly one action per line, aiding readability. However, the reading flow suffers because the logic for generating the sequence is not immediately obvious; a comment or more descriptive naming would help. Code length is acceptable, though the hardcoded loop bounds reduce flexibility. Overall, the code is functional and moderately readable but lacks clarity of intent and uses poor variable naming.
Run 3
The code is generally structured logically with a clear main method and a helper method for checking duplicates. Nesting is minimal, and intent is mostly clear: generate a sequence with a specific recurrence rule. However, the array size is hardcoded to 251, which hurts clarity and flexibility. The contains method repeatedly scans earlier values, making the code longer and less efficient than necessary; using a Set would improve both readability and intent. Variable names are decent but not descriptive of the sequence's purpose. Action granularity is fine—one major operation per line in the loop—but the condition in the if statement combines two distinct checks, slightly reducing clarity. Reading flow is natural, moving from initialization to generation to output, and the helper method is easy to follow.
Run 1
Code Structure: The main sequence-generation logic and membership check are cleanly separated. Nesting: Shallow loops and conditionals make the code easy to follow. Clarity of intent: Descriptive names help, but the sequence rule is unexplained, 250 and 251 are magic numbers, and endIndex is ambiguous because the loop treats it as exclusive. Code length: Concise, with little unnecessary code. Action granularity: Each statement performs a single action, although sequence[i] temporarily stores a candidate before possibly being overwritten. Reading flow: Initialization, generation, adjustment, and output follow a natural order; consistent indentation supports scanning.
Run 2
Code Structure: Clear separation between sequence generation and membership checking. Nesting: Shallow loops and conditionals are easy to follow. Clarity of intent: Descriptive variable names make individual operations understandable, but the sequence's purpose is undocumented, and the exclusive endIndex bound is unclear at the call site. Code length: Concise without unnecessary boilerplate beyond the Java entry point. Action granularity: Each statement performs one clear action. Reading flow: Initialization, calculation, validation, and output follow a natural order. Readability would improve with a named constant for 250, a more explicit membership-bound convention, and a brief explanation of the sequence rule.
Run 3
Code Structure: Clearly separates sequence generation from the membership-check helper. Nesting: Shallow loop-and-conditional nesting is easy to follow. Clarity of intent: Descriptive parameter names and straightforward operations help, but the sequence's purpose is undocumented, 250 and 251 are magic numbers, and endIndex's exclusive interpretation is unclear at the call site. Code length: Compact without unnecessary boilerplate beyond Java's required structure. Action granularity: Each statement performs one primary action. Reading flow: Initialization, generation, adjustment, and output follow a natural order; consistent indentation helps, although a blank line between methods would improve separation.