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Aurora Diary Synthesis

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The technical objective is to synthesize a multi-layered narration from nested observational data, following a specific recursive pattern. The process involves wrapping a core observational line within multiple layers of observer insights, ensuring that the final output preserves the chronological and hierarchical structure of the aurora recordings.

The final output must be a single string where each observer layer adds a "begins:" header and a "notes:" footer around the inner content. The solution must handle empty observer lists by returning only the root line and correctly manage multiple nested levels while maintaining strict newline formatting. This ensures archival integrity and provides a standardized format for Lumenfjord’s astronomical diaries.

Example 1:

Input: root_line = "Lights ripple over the tide.", observers = []
Output:
Lights ripple over the tide.

Example 2:

Input: root_line = "Lights ripple over the tide.", observers = [{"name": "Eira", "insight": "Green curtains meet the reef."}]
Output:
Eira begins:
Lights ripple over the tide.
Eira notes: Green curtains meet the reef.

Example 3:

Input: root_line = "A pale arc crowns the fjord.", observers = [{"name": "Kael", "insight": "Stars echo in the ice."}, {"name": "Lysa", "insight": "Upper bands split in two."}]
Output:
Kael begins:
Lysa begins:
A pale arc crowns the fjord.
Lysa notes: Upper bands split in two.
Kael notes: Stars echo in the ice.

Algorithm Flow

Recommendation Algorithm Flow for Aurora Diary Synthesis - Budibadu
Recommendation Algorithm Flow for Aurora Diary Synthesis - Budibadu

Best Answers

java
import java.util.*;

class Solution {
    public String synthesize_aurora_diary(String root_line, List<Map<String, String>> observers) {
        return recurse(0, root_line, observers);
    }
    
    private String recurse(int idx, String root, List<Map<String, String>> obs) {
        if (idx == obs.size()) return root;
        Map<String, String> current = obs.get(idx);
        String name = current.get("name");
        String insight = current.get("insight");
        return name + " begins:\n" + recurse(idx + 1, root, obs) + "\n" + name + " notes: " + insight;
    }
}