from time import clock
import sys

def sum_of_inverse(n):
    start=clock()
    sum,adds=0.0,0
    for i in range(1,n+1,2):
        sum=sum+(1.0/i)+(1.0/(i+1))
        adds=adds+2
    ela=clock()-start
    return sum,adds,ela

f=open('c:\inputs\in4_9.txt','r+')
f1=open('out_29_sec4_9.txt','w')
m=f.readline()
sum,adds,ela=sum_of_inverse(int(m))
total=sys.getsizeof(sum)+sys.getsizeof(adds)+sys.getsizeof(ela)
f1.write(str('sum is : ')+str(sum)+'\n'+str('no of additions : ')+str(adds)+'\n'+str('time taken : ')+str(ela)+'\n'+str('memory used : ')+str(total))
f.close()
f1.close()