`check50` is not wrong! Please check [this question][1] for more information about `check50`.

Make sure you're in the same directory as `mario.c` and this is the command you run to check your program with check50

    check50 2014/x/pset1/mario mario.c

Also, your input must match the one required by the pset specification page.

Here's a sample output per the pset specification page

    jharvard@appliance (~/Dropbox/pset1): ./mario
    Height: 8
           ##
          ###
         ####
        #####
       ######
      #######
     ########
    #########

Notice that you should let the user type in the height on the same line as the prompt `Height: `!


  [1]: https://cs50.stackexchange.com/questions/1265/how-to-use-check50