sqlite3, 156 bytes

Result

AC

Duration

931ms

Code [DL]

with x as(select v,substr(v,3)-2 j,v k from i union select v,j,k-1 from x where k-1)select printf('*%.'||j||'c*',case when k in(1,v)then'*'else' 'end)from x

stdin

29
77

stdout

*****************************************************************************
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*****************************************************************************

stderr