math - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	732	P1740F Conditional Mix combinatorics dp math *2600	0 / 0	10
	727	P1741B Funny Permutation constructive algorithms math *800	0 / 0	3
	726	P1741C Minimize the Thickness brute force greedy math two pointers *1100	0 / 0	3
	721	P1741F Multi-Colored Segments binary search data structures math sortings *2000	0 / 0	7
	710	P1742E Scuza binary search greedy math *1200	0 / 0	4
	705	P1742G Orray bitmasks brute force greedy math sortings *1500	0 / 0	5
	704	P1743A Password brute force combinatorics implementation math *800	0 / 0	3
	691	P1743G Antifibonacci Cut bitmasks combinatorics constructive algorithms data structures dp hashing math *3000	0 / 0	10
	687	P1744B Even-Odd Increments implementation math *800	0 / 0	3
	683	P1744D Divisibility by 2^n greedy math sortings *1200	0 / 0	4
	682	P1744E1 Divisible Numbers (easy version) brute force math number theory *1500	0 / 0	5
	679	P1744E2 Divisible Numbers (hard version) brute force math number theory *1900	0 / 0	6
	678	P1744F MEX vs MED math two pointers *2000	0 / 0	7
	674	P1746C Permutation Operations constructive algorithms greedy implementation math *1300	0 / 0	4
	659	P1747E List Generation combinatorics dp math *2900	0 / 0	10
	657	P1748A The Ultimate Square math *800	0 / 0	3
	651	P1748D ConstructOR bitmasks chinese remainder theorem combinatorics constructive algorithms math number theory *2100	0 / 0	7
	650	P1748E Yet Another Array Counting Problem binary search data structures divide and conquer dp flows math trees *2300	0 / 0	8
	641	P1749D Counting Arrays combinatorics dp math number theory *1900	0 / 0	6
	635	P1750A Indirect Sort constructive algorithms implementation math *800	0 / 0	3
	629	P1750D Count GCD combinatorics math number theory *1800	0 / 0	6
	626	P1750F Majority combinatorics dp math strings *2700	0 / 0	10
	624	P1750G Doping combinatorics dp math *3300	0 / 0	10
	616	P1753B Factorial Divisibility math number theory *1600	1 / 1	5
	614	P1753C Wish I Knew How to Sort dp math probabilities *2000	0 / 0	7
	604	P1754B Kevin and Permutation constructive algorithms greedy math *800	1 / 1	3
	597	P1758D Range = √Sum binary search brute force constructive algorithms math two pointers *1800	0 / 0	6
	588	P1759B Lost Permutation math *800	0 / 0	3
	587	P1759C Thermostat greedy math shortest paths *1100	0 / 0	3
	581	P1759F All Possible Digits binary search data structures greedy math number theory *1800	0 / 0	6
	579	P1759G Restore the Permutation binary search constructive algorithms data structures greedy math *1900	0 / 0	6
	570	P1760E Binary Inversions data structures greedy math *1100	0 / 0	3
	560	P1761D Carry Bit combinatorics math *2100	0 / 0	7
	558	P1761F1 Anti-median (Easy Version) dp math *3100	0 / 0	10
	557	P1761F2 Anti-median (Hard Version) combinatorics dp math *3500	0 / 0	10
	555	P1762A Divide and Conquer greedy math number theory *800	0 / 0	3
	553	P1762C Binary Strings are Fun combinatorics math *1400	0 / 0	4
	551	P1762E Tree Sum combinatorics math trees *2600	0 / 0	10
	545	P1763A Absolute Maximization bitmasks constructive algorithms greedy math *800	0 / 0	3
	544	P1763B Incinerate binary search brute force data structures implementation math sortings *1200	1 / 1	4
	539	P1763D Valid Bitonic Permutations combinatorics dp implementation math number theory *2200	0 / 0	8
	538	P1763E Node Pairs dp graphs math number theory *2200	0 / 0	8
	532	P1764B Doremy's Perfect Math Class math number theory *900	0 / 0	3
	529	P1764D Doremy's Pegging Game combinatorics dp math *2000	0 / 0	7
	509	P1765E Exchange brute force math *1000	0 / 0	3
	499	P1765J Hero to Zero graph matchings math *2900	0 / 0	10
	497	P1765K Torus Path greedy math *1500	0 / 0	5
	493	P1765M Minimum LCM math number theory *1000	1 / 1	3
	484	P1766D Lucky Chains math number theory *1600	0 / 0	5
	476	P1767D Playoff combinatorics constructive algorithms dp greedy math *1500	0 / 0	5
	475	P1767E Algebra Flash bitmasks brute force dp graphs math meet-in-the-middle trees *2500	0 / 0	9
	473	P1768A Greatest Convex greedy math number theory *800	0 / 0	3
	472	P1768B Quick Sort greedy math *900	0 / 0	3
	468	P1768E Partial Sorting combinatorics math number theory *2300	0 / 0	8
	459	P1770C Koxia and Number Theory brute force chinese remainder theorem math number theory *1700	1 / 1	5
	456	P1770E Koxia and Tree combinatorics dfs and similar dp dsu math probabilities trees *2400	0 / 0	9
	453	P1770F Koxia and Sequence bitmasks combinatorics dp math number theory *3100	0 / 0	10
	451	P1770G Koxia and Bracket divide and conquer fft math *3400	0 / 0	10
	447	P1771A Hossam and Combinatorics combinatorics math sortings *900	0 / 0	3
	444	P1771C Hossam and Trainees greedy math number theory *1600	0 / 0	5
	435	P1773A Amazing Trick constructive algorithms graph matchings math probabilities *1900	0 / 0	6
	429	P1773G Game of Questions bitmasks combinatorics dp fft math probabilities *2800	0 / 0	10
	426	P1773J Jumbled Trees constructive algorithms math *2900	0 / 0	10
	421	P1774A Add Plus Minus Sign constructive algorithms math *800	0 / 0	3
	419	P1774B Coloring constructive algorithms greedy math *1500	0 / 0	5
	402	P1775C Interesting Sequence bitmasks math *1600	0 / 0	5
	401	P1775D Friendly Spiders dfs and similar graphs math number theory shortest paths *1800	0 / 0	6
	397	P1775F Laboratory on Pluto constructive algorithms dp greedy math *2500	0 / 0	9
	391	P1776D Teamwork constructive algorithms greedy math *2800	0 / 0	10
	387	P1776G Another Wine Tasting Event combinatorics constructive algorithms math strings *2100	0 / 0	7
	381	P1776K Uniform Chemistry dp math *3200	0 / 0	10
	379	P1776L Controllers binary search math *1500	0 / 0	5
	376	P1776N Count Permutations math *3500	0 / 0	10
	375	P1777A Everybody Likes Good Arrays! greedy math *800	1 / 1	3
	373	P1777B Emordnilap combinatorics greedy math *900	1 / 1	3
	371	P1777C Quiz Master binary search math number theory sortings two pointers *1700	0 / 0	5
	370	P1777D Score of a Tree bitmasks combinatorics dfs and similar dp math probabilities trees *1900	0 / 0	6
	364	P1778B The Forbidden Permutation greedy math *1300	0 / 0	4
	361	P1778D Flexible String Revisit combinatorics dp math probabilities *2100	0 / 0	7
	360	P1778E The Tree Has Fallen! bitmasks dfs and similar math trees *2500	0 / 0	9
	358	P1778F Maximizing Root dfs and similar dp graphs math number theory trees *2600	0 / 0	10
	355	P1779B MKnez's ConstructiveForces Task constructive algorithms math *900	0 / 0	3
	343	P1780B GCD Partition brute force greedy math number theory *1100	0 / 0	3
	338	P1780E Josuke and Complete Graph binary search brute force data structures math number theory *2400	0 / 0	9
	337	P1780G Delicious Dessert binary search dsu hashing math number theory string suffix structures *2400	0 / 0	9
	336	P1781A Parallel Projection geometry math *800	0 / 0	3
	331	P1781D Many Perfect Squares brute force math number theory *1800	0 / 0	6
	328	P1781F Bracket Insertion combinatorics dp math trees *2700	0 / 0	10
	322	P1783A Make it Beautiful constructive algorithms math sortings *800	1 / 1	3
	320	P1783B Matrix of Differences constructive algorithms math *1100	1 / 1	3
	316	P1783E Game of the Year brute force data structures math number theory *2300	0 / 0	8
	304	P1787A Exponential Equation constructive algorithms math *800	0 / 0	3
	303	P1787B Number Factorization greedy math number theory *1100	0 / 0	3
	301	P1787C Remove the Bracket dp greedy math *1600	0 / 0	5
	298	P1787E The Harmonization of XOR bitmasks constructive algorithms greedy math *2100	0 / 0	7
	297	P1787F Inverse Transformation constructive algorithms implementation math *2500	0 / 0	9
	290	P1788A One and Two brute force implementation math *800	0 / 0	3
	289	P1788B Sum of Two Numbers constructive algorithms greedy implementation math probabilities *1100	0 / 0	3
	288	P1788C Matching Numbers constructive algorithms greedy math *1300	0 / 0	4
	286	P1788D Moving Dots binary search brute force combinatorics math two pointers *2000	0 / 0	7

Pick a problem randomly based on the current filter.