Hi (read title) 372A - Counting Kangaroos is Fun 448D - Multiplication Table 785C - Anton and Fairy Tale 371C - Hamburgers 600B - Queries about less or equal elements 251A - Points on Line 348A - Mafia 1843E - Tracking Segments 1852A - Ntarsis' Set 1156C - Match Points 567D - One-Dimensional Battle Ships