math - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	281	P1789A Serval and Mocha's Array brute force math number theory *800	1 / 1	3
	279	P1789C Serval and Toxel's Arrays combinatorics dp implementation math *1500	0 / 0	5
	277	P1789E Serval and Music Game brute force dp implementation math number theory *2500	0 / 0	9
	275	P1790A Polycarp and the Day of Pi implementation math strings *800	0 / 0	3
	274	P1790B Taisia and Dice greedy greedy math *800	0 / 0	3
	273	P1790C Premutation brute force implementation math *1000	0 / 0	3
	271	P1790F Timofey and Black-White Tree brute force dfs and similar divide and conquer graphs greedy math shortest paths trees *2100	0 / 0	7
	255	P1792B Stand-up Comedian greedy math *1200	0 / 0	4
	254	P1792C Min Max Sort binary search brute force greedy math two pointers *1500	0 / 0	5
	252	P1792D Fixed Prefix Permutations binary search bitmasks data structures hashing math sortings *1700	0 / 0	5
	248	P1793A Yet Another Promotion greedy math *800	0 / 0	3
	245	P1793B Fedya and Array constructive algorithms math *1100	0 / 0	3
	242	P1793D Moscow Gorillas binary search dp greedy implementation math two pointers *1800	0 / 0	6
	236	P1794B Not Dividing constructive algorithms greedy math *900	0 / 0	3
	234	P1794C Scoring Subsequences binary search greedy math two pointers *1300	0 / 0	4
	233	P1794D Counting Factorizations combinatorics divide and conquer dp math number theory *1900	0 / 0	6
	225	P1795D Triangle Coloring combinatorics math *1600	1 / 1	5
	224	P1795E Explosions? binary search data structures dp greedy math *2200	0 / 0	8
	216	P1796C Maximum Set binary search math *1600	0 / 1	5
	212	P1796F Strange Triples brute force math number theory *2900	0 / 0	10
	204	P1797E Li Hua and Array brute force data structures dsu math number theory two pointers *2300	0 / 0	8
	198	P1798C Candy Store greedy math number theory *1700	1 / 1	5
	196	P1798D Shocking Arrangement constructive algorithms greedy math *1600	0 / 0	5
	193	P1798F Gifts from Grandfather Ahmed dp math number theory *2500	0 / 0	9
	192	P1799A Recent Actions data structures greedy implementation math *800	0 / 0	3
	190	P1799B Equalize by Divide brute force constructive algorithms greedy math *1200	0 / 0	4
	184	P1799E City Union constructive algorithms dfs and similar dsu geometry greedy implementation math *2300	0 / 0	8
	181	P1799G Count Voting combinatorics dp math *2600	0 / 0	10
	157	P1801F Another n-dimensional chocolate bar dp math meet-in-the-middle number theory *2700	0 / 0	10
	152	P1802B Settlement of Guinea Pigs greedy implementation math *1000	1 / 1	3
	151	P1804A Lame King greedy math *800	0 / 0	3
	148	P1804C Pull Your Luck brute force greedy math number theory *1500	0 / 0	5
	139	P1805C Place for a Selfie binary search data structures geometry math *1400	0 / 0	4
	136	P1805F1 Survival of the Weakest (easy version) binary search brute force implementation math sortings *2600	0 / 0	10
	135	P1805F2 Survival of the Weakest (hard version) greedy math sortings two pointers *3100	0 / 0	10
	134	P1806A Walking Master geometry greedy math *800	2 / 2	3
	131	P1806C Sequence Master brute force constructive algorithms math *1600	1 / 1	5
	130	P1806D DSU Master combinatorics dp dsu math *2500	0 / 0	9
	127	P1806F1 GCD Master (easy version) greedy math number theory sortings *2900	0 / 0	10
	125	P1806F2 GCD Master (hard version) greedy math sortings *2900	0 / 0	10
	110	P1808B Playing in a Casino math sortings *1200	0 / 0	4
	100	P1808E3 Minibuses on Venus (hard version) brute force combinatorics dp math *2800	0 / 0	10
	96	P1809B Points on Plane binary search greedy math *1000	0 / 0	3
	94	P1809C Sum on Subarrays constructive algorithms greedy math *1500	0 / 0	5
	90	P1809E Two Tanks binary search dp implementation math *2400	0 / 0	9
	87	P1809G Prediction combinatorics dp math *2800	0 / 0	10
	83	P1810B Candies constructive algorithms math number theory *800	0 / 0	3
	78	P1810D Climbing the Tree binary search math *1700	0 / 0	5
	75	P1810F M-tree data structures math sortings trees *2800	0 / 0	10
	70	P1810H Last Number combinatorics math *2900	0 / 0	10
	68	P1811A Insert Digit greedy math strings *800	0 / 0	3
	66	P1811B Conveyor Belts implementation math *1000	0 / 0	3
	63	P1811D Umka and a Long Flight constructive algorithms implementation math *1600	0 / 0	5
	64	P1811E Living Sequence binary search dp math number theory *1500	0 / 0	5
	59	P1811G1 Vlad and the Nice Paths (easy version) combinatorics dp math *2100	0 / 0	7
	60	P1811G2 Vlad and the Nice Paths (hard version) binary search combinatorics data structures dp math two pointers *2200	0 / 0	8
	57	P1814A Coins implementation math *800	0 / 0	3
	55	P1814B Long Legs brute force math *1700	0 / 0	5
	53	P1814D Balancing Weapons binary search brute force data structures math two pointers *2500	0 / 0	9
	49	P1815A Ian and Array Sorting greedy math *1300	0 / 0	4
	43	P1815D XOR Counting bitmasks combinatorics dp math *2600	0 / 0	10
	42	P1815E Bosco and Particle dp math number theory strings *3100	0 / 0	10
	41	P1815F OH NO1 (-2-3-4) constructive algorithms graphs math *3500	0 / 0	10
	9800	P1817C Similar Polynomials combinatorics math *2400	0 / 0	9
	33	P1819C The Fox and the Complete Tree Traversal constructive algorithms dp implementation math trees *2400	0 / 0	9
	31	P1819E Roads in E City interactive math probabilities trees *3200	0 / 0	10
	26	P1820B JoJo's Incredible Adventures math strings two pointers *1100	2 / 3	3
	23	P1821A Matching combinatorics math	14 / 39	6
	19	P1821C Tear It Apart brute force implementation math strings	10 / 27	6
	17	P1821D Black Cells binary search brute force greedy math	3 / 23	9
	13	P1821F Timber combinatorics dp fft math	1 / 11	10
	10	P1822B Karina and Array greedy math sortings	0 / 0	(None)
	8	P1822C Bun Lover math	0 / 0	(None)
	9	P1822D Super-Permutation constructive algorithms math	0 / 0	(None)
	5	P1822E Making Anti-Palindromes greedy math strings	0 / 0	(None)
	2	P1822G1 Magic Triples (Easy Version) brute force math number theory	0 / 0	(None)
	1	P1822G2 Magic Triples (Hard Version) binary search brute force divide and conquer math number theory	0 / 0	(None)
	3641	P1823A A-characteristic constructive algorithms math	0 / 0	(None)
	3639	P1823B Sort with Step math sortings	0 / 0	(None)
	3636	P1823C Strongly Composite greedy math number theory	0 / 0	(None)
	3630	P1823F Random Walk graphs math probabilities	0 / 0	(None)
	9793	P1824B1 LuoTianyi and the Floating Islands (Easy Version) combinatorics dp math probabilities trees	0 / 0	(None)
	9792	P1824B2 LuoTianyi and the Floating Islands (Hard Version) combinatorics dp math probabilities trees	0 / 0	(None)
	9787	P1825B LuoTianyi and the Table brute force greedy implementation math	0 / 1	10
	9785	P1826B Lunatic Never Content math number theory	0 / 0	(None)
	9784	P1826C Dreaming of Freedom greedy math number theory	0 / 0	(None)
	9780	P1826F Fading into Fog geometry interactive math probabilities	0 / 0	(None)
	9823	P1827A Counting Orders combinatorics math sortings two pointers *1100	0 / 0	3
	9816	P1828A Divisible Array constructive algorithms math *800	0 / 0	3
	9815	P1828B Permutation Swap math number theory *900	0 / 0	3
	9770	P1829F Forever Winter dfs and similar graphs math	0 / 0	(None)
	9769	P1829G Hits Different data structures dp implementation math	0 / 0	(None)
	9767	P1829H Don't Blame Me bitmasks combinatorics dp math	0 / 0	(None)
	9846	P1830B The BOSS Can Count Pairs brute force math	0 / 0	(None)
	9845	P1830C Hyperregular Bracket Strings combinatorics hashing math number theory sortings	0 / 0	(None)
	9809	P1832D1 Red-Blue Operations (Easy Version) binary search greedy implementation math *2100	0 / 0	7
	9808	P1832D2 Red-Blue Operations (Hard Version) binary search constructive algorithms greedy implementation math *2400	0 / 0	9
	9837	P1833C Vlad Building Beautiful Array greedy math *800	0 / 0	3
	9834	P1833F Ira and Flamenco combinatorics constructive algorithms data structures implementation math sortings two pointers *1700	0 / 0	5
	9941	P1834E MEX of LCM binary search data structures implementation math number theory *2300	0 / 0	8

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