Fix problem set 0 link
Fix problem set 0 link

LaunchCodeEducation/cs50x-live,LaunchCodeEducation/cs50x-stlouis,LaunchCodeEducation/cs50x-kansascity,LaunchCodeEducation/cs50x-live,LaunchCodeEducation/cs50x-maryville,LaunchCodeEducation/cs50x-maryville,LaunchCodeEducation/cs50x-maryville,LaunchCodeEducation/cs50x-kansascity,LaunchCodeEducation/cs50x-maryville,LaunchCodeEducation/cs50x-kansascity,LaunchCodeEducation/cs50x-stlouis,LaunchCodeEducation/cs50x-stlouis,LaunchCodeEducation/cs50x-live,LaunchCodeEducation/cs50x-kansascity,LaunchCodeEducation/cs50x-live,LaunchCodeEducation/cs50x-maryville,LaunchCodeEducation/cs50x-stlouis,LaunchCodeEducation/cs50x-kansascity,LaunchCodeEducation/cs50x-stlouis