add TopCoder SRM 567
fix date format
add sgu 122
add sgu 123
add StandardCodeLibrary.ComputationalGeometry and sgu 124
Revert "add StandardCodeLibrary.ComputationalGeometry and sgu 124"

This reverts commit f4863d935f89997b91decf3cf5ae6d9592939a7e.
add StandardCodeLibrary.ComputationalGeometry and sgu 124