Removed invalid 'complete' attribute in exercise sheet 1
Removed invalid 'complete' attribute in exercise sheet 1

BackofenLab/AlgoDat,TobiasFaller/AlgoDat,TobiasFaller/AlgoDat,TobiasFaller/AlgoDat,BackofenLab/AlgoDat,BackofenLab/AlgoDat,BackofenLab/AlgoDat,BackofenLab/AlgoDat,TobiasFaller/AlgoDat,TobiasFaller/AlgoDat