1. Let n be a positive integer, any one you wish, but fixed once chosen.

2. UDP port number is a positive integer value.

3. Please enter a positive integer.

4. Diophantine equation; Positive integer solution; congruence; Recurrent sequence.

5. You should specify price of the purchase ( positive integer number ) and purchase description.

6. The first line should contain one positive integer: the solution of subtask A.

7. The digital root of a positive integer is found by summing the digits of the integer.

8. In this paper, we study the condition which makes the fundamental group of graph have every positive integer as the index of some normal subgroup.

9. When the domain of interpretation is finite and its size is a fixed positive integer, the satisfiability problem in the first-order logic can be reduced to SAT.