Assume the exponential problem an $.$ A$1$ is an algorithm use BF to solve it$,$ A$2$ use decrease by $1,$ A$3$

use decrease by a constant factor and A$4$ use D&C $($divide & conquer$).$ which is the best one

Question $29$Answer

a$.$

A$2$

b$.$

A$1$

c$.$

A$3$

d$.$

A$4$