refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조

에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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+---
+id: cpp-queues
+title: "C++ Queues"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["std::queue", "FIFO", "C++ 큐"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.86
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["cpp", "programming-language", "w3schools", "stl", "queue", "fifo"]
+raw_sources: ["https://www.w3schools.com/cpp/cpp_queues.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CPP Queues]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`queue` is stack's mirror image — same restricted-access philosophy (no arbitrary indexing, no brace-list initialization, only `.push()`/`.pop()`), but instead of both ends collapsing onto one "top," a queue keeps `.front()` and `.back()` as two DISTINCT accessible ends, encoding FIFO order (supermarket line: first in line, first served) the same way stack encoded LIFO — the two containers share nearly identical method names (`.push()`, `.pop()`, `.size()`, `.empty()`) but differ in exactly which end `.pop()` removes from, which is the single fact that determines whether a container behaves like a stack or a queue. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **FIFO (First In, First Out)** — the first element added is the first one removed, unlike stack's LIFO. [S1]
+- **`queue<type> name`** — requires `<queue>`; like stack, CANNOT be initialized with a curly-brace list at declaration — must use `.push()` after declaring. [S1]
+- **`.push()`** — adds an element to the BACK (end) of the queue. [S1]
+- **`.front()` / `.back()`** — TWO accessible points (unlike stack's single `.top()`): front is the oldest/first element, back is the newest/last element; both are also assignable. [S1]
+- **`.pop()`** — removes the FRONT element (the oldest one) — this is the key difference from stack's `.pop()`, which removes from the top/back instead. [S1]
+- **`.size()` / `.empty()`** — same semantics as stack/list/vector. [S1]
+
+## 📖 세부 내용 (Details)
+- Declaration + fill: `queue<string> cars; cars.push("Volvo"); cars.push("BMW"); cars.push("Ford"); cars.push("Mazda");` — resulting order: Volvo(front), BMW, Ford, Mazda(back). [S1]
+- Access/modify: `cars.front()` → "Volvo", `cars.back()` → "Mazda"; both can be reassigned directly (`cars.front() = "Tesla";`). [S1]
+- Remove: `cars.pop();` removes Volvo (the front/oldest), making BMW the new front. [S1]
+- Same brace-initialization restriction as stack is called out explicitly: `queue<string> cars = {"Volvo", ...};` is not allowed. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **stack과 동일한 메서드명, 반대 방향 의미**: stack의 `.pop()`은 top(가장 최근 추가된 요소)을 제거했지만, queue의 `.pop()`은 front(가장 오래된 요소)를 제거한다는 점이 이번 챕터에서 stack과의 핵심 대비로 확인됨 — 메서드 이름은 같아도 동작 방향이 정반대. [S1]
+- **접근 가능 지점이 하나에서 둘로 늘어남**: stack은 `.top()` 하나만 노출했지만, queue는 `.front()`와 `.back()` 두 지점을 모두 노출한다는 점이 FIFO 구조의 특성상 필요한 차이로 확인됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 슈퍼마켓 줄서기에 비유해 FIFO를 설명하고, 자동차 이름을 push()로 채운 뒤 front()/back()으로 확인하는 예제가 원문에서 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Queue push/front/back/pop — pop always removes from the front, unlike stack (C++):
+```cpp
+#include <queue>
+queue<string> cars;
+cars.push("Volvo");
+cars.push("BMW");
+cars.push("Ford");
+cars.push("Mazda");
+
+cout << cars.front();  // "Volvo" (oldest)
+cout << cars.back();   // "Mazda" (newest)
+cars.pop();             // removes "Volvo" (the front)
+cout << cars.front();  // now "BMW"
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.86
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[C++ Tutorial]]
+- **관련 개념:** [[CPP Stacks]], [[CPP Data Structures]], [[CPP Deque]]
+- **참조 맥락:** 데이터 구조(STL) 섹션 — Stacks와 짝을 이루는 챕터, 다음은 Deque.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — C++ Queues — https://www.w3schools.com/cpp/cpp_queues.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "C++ Queues" page (Astra wiki-curation, P-Reinforce v3.1 format).