Sunday, January 27, 2019

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T.C.S Ninja Programs || Series

Consider the following series:

1,1,2,3,4,9,8,27,16,81,32,243,64,729,128,2187…


This series is a mixture of 2 series – all the odd terms in this series form a geometric series and all the even terms form yet another geometric series.

Write a program to find the Nth term in the series.

The value N in a positive integer that should be read from STDIN. The Nth term that is calculated by the program should be written to STDOUT. Other than value of n th term,no other character / string or message should be written to STDOUT.

For example , if N=16, the 16th term in the series is 2187, so only value 2187 should be printed to STDOUT.


You can assume that N will not exceed 30.

You can assume that N will not exceed 30.

#include <stdio.h> #include <math.h>

int main() {  int n, res, a, r, term;  scanf("%d", &n);  if(n % 2 == 1)  {   a = 1;   r = 2;   term = (n + 1) / 2;   res = pow(2, term - 1);   printf("%d", res);  }  else  {   a = 1;   r = 3;   term = n / 2;   res = pow(3, term - 1);   printf("%d", res);  }  return 0; }

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