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[4-liner] 170 chars solution in Creative category for On the same path by Phil15
def on_same_path(t,p):
def d(r,C):nonlocal T;T+=1;i[r]=T;[d(*c)for c in C];T+=1;o[r]=T
T,i,o=0,{},{};d(*t)
for u,v in p:yield i[u]
Dec. 8, 2019
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