import time
import sys
f1= open('in1_5.txt','r')
n=int(f1.readline())
f1.closed

j=time.clock()
f=1
mul =0
while n >= 1 :
    mul=mul+1
    f=f*n
    n=n-2
i=time.clock()
i-j
f2=open('out_25_sec1_5.txt','w')
f2.write(str(f)+"\n")
f2.write('No. of Multiplication ='+str(mul)+'\n')
f2.write('Time Used='+str(i-j))
mem=sys.getsizeof(f)+sys.getsizeof(mul)+sys.getsizeof(n)
f2.write('\nMemory Used='+str(mem)) 
f2.close()