Tom and Sangu played a game. First, the Tom gives Sangu a sequence of different numbers N a1, a2,., an (not really set) and the number K. Sangu should build all the sequences of the series in length K. In each row, he should write down the product of the numbers K - 2: all the features of the following except the smallest and finest element. Sangu wins the game if he can write down all these numbers and tell Tom their product (module 10° +7, as it can be very large). However, Sangu is a lazy child and wants to help him win the game. Count the number Sangu has to tell Tom in python language.

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
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Tom and Sangu played a game. First, the Tom gives Sangu a sequence of different numbers N a1,
a2,., aN (not really set) and the number K. Sangu should build all the sequences of the series in
length K. In each row, he should write down the product of the numbers K – 2: all the features of the
following except the smallest and finest element.
Sangu wins the game if he can write down all these numbers and tellI Tom their product (module 10°
+ 7, as it can be very large). However, Sangu is a lazy child and wants to help him win the game.
Count the number Sangu has to tell Tom in python language.
Input
1
43
123 4
Output
36
Transcribed Image Text:Tom and Sangu played a game. First, the Tom gives Sangu a sequence of different numbers N a1, a2,., aN (not really set) and the number K. Sangu should build all the sequences of the series in length K. In each row, he should write down the product of the numbers K – 2: all the features of the following except the smallest and finest element. Sangu wins the game if he can write down all these numbers and tellI Tom their product (module 10° + 7, as it can be very large). However, Sangu is a lazy child and wants to help him win the game. Count the number Sangu has to tell Tom in python language. Input 1 43 123 4 Output 36
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