Problemset - Codeforces

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Codeforces Round (Div. 2)
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combinatorics

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Problems

#	Name
351B	Jeff and Furik combinatorics, dp, probabilities	1900	x2380
340E	Iahub and Permutations combinatorics, math	2000	x2465
340C	Tourist Problem combinatorics, implementation, math	1600	x4223
336E	Vasily the Bear and Painting Square bitmasks, combinatorics, dp, implementation	2700	x114
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x972
327E	Axis Walking bitmasks, combinatorics, constructive algorithms, dp, meet-in-the-middle	2300	x1392
327C	Magic Five combinatorics, math	1700	x3198
325E	The Red Button combinatorics, dfs and similar, dsu, graphs, greedy	2800	x784
323A	Black-and-White Cube combinatorics, constructive algorithms	1600	x738
322B	Ciel and Flowers combinatorics, math	1600	x11743
319A	Malek Dance Club combinatorics, math	1600	x2792
306C	White, Black and White Again combinatorics, number theory	2100	x483
305D	Olya and Graph combinatorics, math	2200	x507
300C	Beautiful Numbers brute force, combinatorics	1800	x9441
296B	Yaroslav and Two Strings combinatorics, dp	2000	x2244
295D	Greg and Caves combinatorics, dp	2400	x649
295C	Greg and Friends combinatorics, dp, graphs, shortest paths	2100	x1697
294C	Shaass and Lights combinatorics, number theory	1900	x3804
293B	Distinct Paths brute force, combinatorics	2700	x848
288D	Polo the Penguin and Trees combinatorics, dfs and similar, trees	2400	x753
288B	Polo the Penguin and Houses combinatorics	1500	x2912
285E	Positions in Permutations combinatorics, dp, math	2600	x991
285D	Permutation Sum bitmasks, combinatorics, dp, implementation, meet-in-the-middle	1900	x1546
283E	Cow Tennis Tournament combinatorics, data structures, math	2800	x768
272E	Dima and Horses combinatorics, constructive algorithms, graphs	2200	x1218
272D	Dima and Two Sequences combinatorics, math, sortings	1600	x2625
258C	Little Elephant and LCM binary search, combinatorics, dp, math	2000	x1788
258B	Little Elephant and Elections brute force, combinatorics, dp	1900	x1446
251A	Points on Line binary search, combinatorics, two pointers	1300	x17586
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x775
232B	Table bitmasks, combinatorics, dp, math	1900	x1461
229E	Gifts combinatorics, dp, math, probabilities	2600	x459
229C	Triangles combinatorics, graphs, math	1900	x1617
223C	Partial Sums combinatorics, math, number theory	1900	x1557
217D	Bitonix' Patrol bitmasks, brute force, combinatorics, dfs and similar, math	2900	x251
215E	Periodical Numbers combinatorics, dp, number theory	2100	x556
213B	Numbers combinatorics, dp	1900	x1771
212C	Cowboys combinatorics, dp, math	2100	x387
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x5689
201E	Thoroughly Bureaucratic Organization binary search, combinatorics	2600	x415
176C	Playing with Superglue combinatorics, constructive algorithms	2000	x479
171B	Star *special problem, combinatorics	1300	x4043
156D	Clues combinatorics, graphs	2500	x1575
156C	Cipher combinatorics, dp	2000	x2395
152C	Pocket Book combinatorics	1400	x10583
150B	Quantity of Strings combinatorics, dfs and similar, graphs, math	1600	x4136
145D	Lucky Pair combinatorics, data structures, implementation	2900	x243
145C	Lucky Subsequence combinatorics, dp, math	2100	x1908
140E	New Year Garland combinatorics, dp	2600	x938
135E	Weak Subsequence combinatorics	3000	x305
131C	The World is a Theatre combinatorics, math	1400	x11088
128C	Games with Rectangle combinatorics, dp	2000	x2929
124B	Permutations brute force, combinatorics, implementation	1400	x3895
123C	Brackets combinatorics, dp, greedy	2300	x603
121C	Lucky Permutation brute force, combinatorics, number theory	1900	x1286
113E	Sleeping combinatorics, implementation, math	2700	x119
111D	Petya and Coloring combinatorics, dp	2300	x759
107B	Basketball Team combinatorics, dp, math, probabilities	1600	x3459
91C	Ski Base combinatorics, dsu, graphs	2300	x879
57C	Array combinatorics, math	1900	x2583
52B	Right Triangles combinatorics	1600	x2044
51E	Pentagon combinatorics, graphs, matrices	2400	x405
44I	Toys brute force, combinatorics	2300	x194
40E	Number Table combinatorics	2500	x682
37D	Lesson Timetable combinatorics, dp, math	2300	x413
28C	Bath Queue combinatorics, dp, probabilities	2200	x1039
26D	Tickets combinatorics, math, probabilities	2400	x782
26C	Parquet combinatorics, constructive algorithms, greedy, implementation	2000	x856
15E	Triangles combinatorics, dp	2600	x582
9D	How many trees? combinatorics, divide and conquer, dp	1900	x3853

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