144 problems of the Austrian-polish Mathematics competition 1978-1993 pdf
https://drive.google.com/file/d/1_9D8-0Rs6WYr_aMY2_HtePsFJvY2LwvP/view?usp=drivesdk
Congurence and similarity problem
https://drive.google.com/file/d/13eFYoWZEDNPqFeOyQaQDdlqXXJcpD3hA/view?usp=drivesdk
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