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Open Claude Desktopprefix-sums · graph-algorithms · sorting
The organizer’s problem statement is available at the official source link.
sample trace
Counting Haybales: prefix sums walkthrough
Counting Haybales: use the linked editorial?s prefix sums, graph algorithms idea on the published sample, then verify the displayed output.
Published input7
4
2 2 2 3
4
3 3 1 2
4
5 3 4 2
6
3 3 1 1 2 2
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1 3 3 4 1 2
6
4 1 2 3 5 4
10
1 5 6 6 6 4 2 3 2 5modelAlgorithm ideaStore cumulative aggregates so a range can be answered from two prefix values instead of rescanning its elements.task resultExpected output4
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5
15
9
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- 1
Accumulate
Build the running total or count across the input order. - 2
Query
Subtract the prefix before a range from the prefix at its end. - 3
Finish
Apply the task?s boundary adjustment and compare with the sample result. - 4
Verify the sample
Use the published sample output to check the result of this idea on the displayed input.
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|12 lines, 156 charsRun output
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