[1] "For n = 100 , system time is"
   user  system elapsed 
  0.039   0.000   0.040 
[1] "For n = 200 , system time is"
   user  system elapsed 
  0.163   0.000   0.162 
[1] "For n = 300 , system time is"
   user  system elapsed 
  0.355   0.001   0.354 
[1] "For n = 400 , system time is"
   user  system elapsed 
  0.701   0.003   0.700 
[1] "For n = 500 , system time is"
   user  system elapsed 
  1.062   0.004   1.058 
