CSE 2321 Lecture 27: Recursion Tree Method for Recurrances

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Lecture 27
The Recursion Tree method for recurrances
IDEA Convert recurrance into atree so
each node represents the cost incurred
at various levels of recursion
Then sum the cost of all levels
Ex Solve Tcn 2T nath using
arecursion hee
Tcn a2TCN2th 1nz2T n4t.tn z
m2 m2
t
17h12 THI 2
Tch14 Wy Tch14T 1
ITCH 4a21 6844J
write nn2Ci O
This
thee nnnfi D
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ccaCD
IY
T748 T748 748 pal 2
of nodes level iai
cost of node n2
2
998IE IdeeeDk7aeE9aeei7GJEiF
hi
2l
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