Write a C Program that will compute for npr (n taken r permutations).
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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C
Problem Statement
Write a C Program that will compute for npr (n taken r
permutations).
Input
Input starts with a number N and is followed by N pairs of
numbers n and r.
Output
Output n Pr
Limits
1 <N< 20
1 \le r \le n \le 1000000
Notes
Problems will have test cases that are not listed in their
specification. Your solution must produce the right output for
these hidden test cases.
Sample Input #1
5
4 1
4 3
9 3
2 2
9 10
Sample Output #1
4
24
504
2
not valid
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