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Give implementation-level description of a TM M that solves the following Path Problem: Path Problem for Directed Graphs Input : A directed graph G =
Give implementation-level description of a TM M that solves the following Path Problem:
Path Problem for Directed Graphs
Input: A directed graph G = (N, E) and two nodes vi , vj N
Output: yes, if there is a path from vi to vj in G no, otherwise. You can assume that the input to M is the encoding of G followed by the encoding of the two nodes vi and vj . There are three #s separate the encoding of the two nodes from the encoding of the graph, and there is a # symbol separating vi and vj . (Hint: Consider using a two-tape nondeterministic TM.)
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