DSA · Theory

Adjacency List

Theory

800/810

Adjacency List

Adjacency List is simple if you keep it on paper. Amit uses it for Adjacency List on Amit's board in lab hour.

Adjacency List order: meaning → one Adjacency List step Amit can write from memory → one limit. Dumping ten features helps nobody.

Adjacency List exists so Amit can keep Adjacency List on Amit's board correct in lab hour.

Adjacency List shows up in lab hour. Name Adjacency List on Amit's board, not “a real-world scenario”.

Adjacency List miss — copy-pasting Adjacency List without a dry-run. Fix it before you talk about advanced DSA.

After Adjacency List, Amit should still remember copy-pasting Adjacency List without a dry-run.

Close Adjacency List with: “If I skip it, Adjacency List on Amit's board goes wrong like this: copy-pasting Adjacency List without a dry-run.”

Exam tip

Say Adjacency List in one breath, then one Adjacency List step Amit can write from memory, then copy-pasting Adjacency List without a dry-run.

Example

# adjacency list
graph = {
    "A": [("B", 2), ("C", 5)],
    "B": [("A", 2), ("C", 1)],
    "C": [("A", 5), ("B", 1)],
}
for u, edges in graph.items():
    print(u, "->", edges)

Adjacency List — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Short notes

DefAdjacency List — Amit uses it for Adjacency List on Amit's board in lab hour.
RuleAdjacency List → one Adjacency List step Amit can write from memory.
RememberAdjacency List + time vs memory (lab hour).
UseAdjacency List in lab hour (Adjacency List on Amit's board).
TrapAdjacency List — copy-pasting Adjacency List without a dry-run.
ExAdjacency List → Adjacency List on Amit's board.

DSA · Theory

Adjacency List

← All stacks

Theory

800/810

Adjacency List

Adjacency List is simple if you keep it on paper. Amit uses it for Adjacency List on Amit's board in lab hour.

Adjacency List order: meaning → one Adjacency List step Amit can write from memory → one limit. Dumping ten features helps nobody.

Adjacency List exists so Amit can keep Adjacency List on Amit's board correct in lab hour.

Adjacency List shows up in lab hour. Name Adjacency List on Amit's board, not “a real-world scenario”.

Adjacency List miss — copy-pasting Adjacency List without a dry-run. Fix it before you talk about advanced DSA.

After Adjacency List, Amit should still remember copy-pasting Adjacency List without a dry-run.

Close Adjacency List with: “If I skip it, Adjacency List on Amit's board goes wrong like this: copy-pasting Adjacency List without a dry-run.”

Exam tip

Say Adjacency List in one breath, then one Adjacency List step Amit can write from memory, then copy-pasting Adjacency List without a dry-run.

Example

# adjacency list
graph = {
    "A": [("B", 2), ("C", 5)],
    "B": [("A", 2), ("C", 1)],
    "C": [("A", 5), ("B", 1)],
}
for u, edges in graph.items():
    print(u, "->", edges)

Adjacency List — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Short notes

DefAdjacency List — Amit uses it for Adjacency List on Amit's board in lab hour.
RuleAdjacency List → one Adjacency List step Amit can write from memory.
RememberAdjacency List + time vs memory (lab hour).
UseAdjacency List in lab hour (Adjacency List on Amit's board).
TrapAdjacency List — copy-pasting Adjacency List without a dry-run.
ExAdjacency List → Adjacency List on Amit's board.

Adjacency List

Example

Short notes

Questions

Adjacency List

Example

Short notes

Questions