Prokes L. - Problem 1
Prokes L. - Problem 2
Pogosiants E. - Problem 3
Hildebrand A. - Problem 4
Peckover J. - Problem 5
Postarev N. - Problem 6
Proskurowski W. - Problem 7
Sojka P. - Problem 8
Aloni H. - Problem 9
Koksharov V. - Problem 10
