题库 - combinatorics - HydroOJ

	ID	题目显示标签隐藏标签	AC / 尝试	难度
	7065	P9D How many trees? combinatorics divide and conquer dp *1900	1 / 1	6
	7034	P15E Triangles combinatorics dp *2600	0 / 0	10
	6984	P26C Parquet combinatorics constructive algorithms greedy implementation *2000	0 / 0	7
	6983	P26D Tickets combinatorics math probabilities *2400	0 / 0	9
	6974	P28C Bath Queue combinatorics dp probabilities *2200	0 / 0	8
	6928	P37D Lesson Timetable combinatorics dp math *2300	0 / 0	8
	6903	P40E Number Table combinatorics *2500	0 / 0	9
	6879	P44I Toys brute force combinatorics *2300	0 / 0	8
	6835	P51E Pentagon combinatorics graphs matrices *2400	0 / 0	9
	6832	P52B Right Triangles combinatorics *1600	0 / 0	5
	6808	P57C Array combinatorics math *1900	2 / 2	6
	6658	P91C Ski Base combinatorics dsu graphs *2300	0 / 0	8
	6603	P107B Basketball Team combinatorics dp math probabilities *1600	0 / 0	5
	6587	P111D Petya and Coloring combinatorics dp *2300	0 / 0	8
	6579	P113E Sleeping combinatorics implementation math *2700	0 / 0	10
	6542	P121C Lucky Permutation brute force combinatorics number theory *1900	0 / 0	6
	6535	P123C Brackets combinatorics dp greedy *2300	0 / 0	8
	6531	P124B Permutations brute force combinatorics implementation *1400	0 / 0	4
	6516	P128C Games with Rectangle combinatorics dp *2000	0 / 0	7
	6509	P131C The World is a Theatre combinatorics math *1400	1 / 1	4
	6491	P135E Weak Subsequence combinatorics *3000	0 / 0	10
	6472	P140E New Year Garland combinatorics dp *2600	0 / 0	10
	6451	P145C Lucky Subsequence combinatorics dp math *2100	0 / 0	7
	6450	P145D Lucky Pair combinatorics data structures implementation *2900	0 / 0	10
	6433	P150B Quantity of Strings combinatorics dfs and similar graphs math *1600	0 / 0	5
	6425	P152C Pocket Book combinatorics *1400	0 / 0	4
	6413	P156C Cipher combinatorics dp *2000	0 / 0	7
	6412	P156D Clues combinatorics graphs *2500	0 / 0	9
	6358	P171B Star special problem combinatorics 1300	0 / 0	4
	6331	P176C Playing with Superglue combinatorics constructive algorithms *2000	0 / 0	7
	6169	P201E Thoroughly Bureaucratic Organization binary search combinatorics *2600	0 / 0	10
	6158	P204A Little Elephant and Interval binary search combinatorics dp *1500	0 / 0	5
	6109	P212C Cowboys combinatorics dp math *2100	0 / 0	7
	6104	P213B Numbers combinatorics dp *1900	0 / 0	6
	6095	P215E Periodical Numbers combinatorics dp number theory *2100	0 / 0	7
	6084	P217D Bitonix' Patrol bitmasks brute force combinatorics dfs and similar math *2900	0 / 0	10
	6061	P223C Partial Sums combinatorics math number theory *1900	0 / 0	6
	6038	P229C Triangles combinatorics graphs math *1900	0 / 0	6
	6036	P229E Gifts combinatorics dp math probabilities *2600	0 / 0	10
	6027	P232B Table bitmasks combinatorics dp math *1900	0 / 0	6
	6009	P235E Number Challenge combinatorics dp implementation math number theory *2600	0 / 0	10
	5946	P251A Points on Line binary search combinatorics two pointers *1300	0 / 0	4
	5915	P258B Little Elephant and Elections brute force combinatorics dp *1900	0 / 0	6
	5914	P258C Little Elephant and LCM binary search combinatorics dp math *2000	0 / 0	7
	5856	P272D Dima and Two Sequences combinatorics math sortings *1600	0 / 0	5
	5857	P272E Dima and Horses combinatorics constructive algorithms graphs *2200	0 / 0	8
	5813	P283E Cow Tennis Tournament combinatorics data structures math *2800	0 / 0	10
	5807	P285D Permutation Sum bitmasks combinatorics dp implementation meet-in-the-middle *1900	0 / 0	6
	5806	P285E Positions in Permutations combinatorics dp math *2600	0 / 0	10
	5797	P288B Polo the Penguin and Houses combinatorics *1500	0 / 0	5

根据当前过滤条件随机选择一道题