Question: Consider a graph G = (V, E) whose edges are marked red or blue. An alternating path is a path whose edges alternate in colour

Consider a graph G = (V, E) whose edges are marked red or blue. An alternating path is a path whose edges alternate in colour (red, blue, red, . . . ; or blue, red, blue . . .). The alternating distance from vertex u to vertex v is the length of the shortest alternating path from u to v. Determine in linear time the alternating distance from a source vertex s to all vertices.

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