Задачи
Automatic Input Verifier#1919
Много трудно · Implementation
Friendly Points#1920
Лесно · Geometry · Sorting · Binary Search
Expanding Lake#1921
Много трудно · Geometry
Octahedron And Dominoes#1922
Лесно · Dynamic programming
Tiny Puzzle#1923
Много трудно · Brute force · Graphs
Circular Island#1924
Много трудно · Geometry
Traffic Jam#1925
Много трудно · Dynamic programming · Shortest paths
Number of Permutations#1926
Много лесно · Dynamic programming · Math
Perspective#1927
Много лесно · Graphs
Enjoy Arithmetic Progressions#1928
Много трудно · Dynamic programming
Completely Non-zero Determinant#1929
Лесно · Matrix
Fast Typing#1930
Много трудно · Dynamic programming · Probabilities
XYZX 2009#1931
Много лесно · Implementation
Greatest Greatest Common Divisor#1932
Много лесно · Number theory
Colored Wizards - 2#1933
Много лесно · Graphs
Graph of operations#1934
Много лесно · 2-SAT
Regular matching#1935
Много трудно · Graphs · Graph matchings
Flights#1936
Много лесно · Graphs · Shortest paths
Fire safety#1937
Много лесно · Graphs
Island Nations#1938
Лесно · Graphs · Shortest paths
King#1939
Лесно · Graphs
Ice rink#1940
Трудно · Brute force · Implementation · Graphs · Depth-first Search
Ancestor#1941
Лесно · Trees
Inevitability#1942
Много лесно · Graphs
Bridges#1943
Много лесно · Graphs