def lrta_star_agent(s1):
"[Fig. 4.24]"
unimplemented()
def online_dfs_agent(s1):
"[Fig. 4.21]"
unimplemented()
def and_or_graph_search(problem):
"[Fig. 4.11]"
unimplemented()
def lrta_star_agent(s1):
"[Fig. 4.24]"
unimplemented()
def online_dfs_agent(s1):
"[Fig. 4.21]"
unimplemented()
def and_or_graph_search(problem):
"[Fig. 4.11]"
unimplemented()
