Foreword... vii
Authors' Preface... xi
Publisher's Preface... xvii
Problems... 1
The Fifty-Third Olympiad (1987)... 3
The Fifty-Fourth Olympiad (1988)... 13
The Fifty-Fifth Olympiad (1989)... 21
The Fifty-Sixth Olympiad (1990) ... 31
The Fifty-Seventh Olympiad (1991)... 41
The Fifty-Third Olympiad (1987): Solutions... 53
The Fifty-Fourth Olympiad (1988): Solutions ... 75
The Fifty-Fifth Olympiad (1989): Solutions ... 97
The Fifty-Sixth Olympiad (1990): Solutions ... 125
The Fifty-Seventh Olympiad (1991): Solutions ... 151
First-Prize Winners ... 181
Statistics... 183
Glossary ... 189
Author Index... 193
Subject Index... 195