A(1)<A(2)<,..,<A(n) . , , k, (k)=. , , . S , A(s). A(s)=, . : A(s)<, , 1 s , A(s)>, , S n . . - , - . . , =12 - , S . =12 (2,3,4,6,10,12,20,30,35,45) . 30.
(2,3,4,6, 10,12,20,30,35,45).
1 2 3 4 5 6 7 8 9 10.
S=5, (5)=10 (5)<), .
(2,3,4,6,10, 12,20, 30,35,45).
1 2 3 4 5 6 7 8 9 10.
S=8, (8)=30 (8)>), .
(2,3,4,6,10, 12 ,20, 30,35,45).
1 2 3 4 5 6 7 8 9 10.
S=6, (6)=12 (6)=), =12 .
.30.
.31 , .
.31.