Assign directions to edges so that the directed graph remains acyclic

Assign directions to edges so that the directed graph remains acyclic (alt) is a DSA topic. In plain words you use it for bus routes in a city map. Don’t start with a slogan — start with that picture.

Smallest example: BFS queue / DFS stack. Type it, run it, and say what you see. If you can do that from memory, you know Assign directions to edges so that the directed graph remains acyclic (alt).

From the example next to this theory: Assign directions to edges so that the directed graph remains acyclic (alt) — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Trap — no visited set → infinite loop. Fix that before you talk about advanced DSA.

Viva: what is Assign directions to edges so that the directed graph remains acyclic (alt)? Then show BFS queue / DFS stack. Then name the trap.

Exam tip

What is Assign directions to edges so that the directed graph remains acyclic (alt)? Show this: BFS queue / DFS stack. Trap: no visited set → infinite loop.

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)

Assign directions to edges so that the directed graph remains acyclic (alt) — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Short notes

DefAssign directions to edges so that the directed graph remains acyclic (alt) — bus routes in a city map.
RuleBFS queue / DFS stack
Trapno visited set → infinite loop
Usea city map

Assign directions to edges so that the directed graph remains acyclic

Smallest example: BFS queue / DFS stack. Type it, run it, and say what you see. If you can do that from memory, you know Assign directions to edges so that the directed graph remains acyclic (alt).

Trap — no visited set → infinite loop. Fix that before you talk about advanced DSA.

Viva: what is Assign directions to edges so that the directed graph remains acyclic (alt)? Then show BFS queue / DFS stack. Then name the trap.

Exam tip

What is Assign directions to edges so that the directed graph remains acyclic (alt)? Show this: BFS queue / DFS stack. Trap: no visited set → infinite loop.

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)

Assign directions to edges so that the directed graph remains acyclic (alt) — graphs are often stored as adjacency lists: vertex → list of (neighbor, weight).

Short notes

DefAssign directions to edges so that the directed graph remains acyclic (alt) — bus routes in a city map.
RuleBFS queue / DFS stack
Trapno visited set → infinite loop
Usea city map

Assign directions to edges so that the directed graph remains acyclic

Example

Short notes

Questions

Assign directions to edges so that the directed graph remains acyclic

Example

Short notes

Questions