math - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	2028	P1548B Integers Have Friends binary search data structures divide and conquer math number theory two pointers *1800	0 / 0	6
	2027	P1548C The Three Little Pigs combinatorics dp fft math *2500	0 / 0	9
	2026	P1548D1 Gregor and the Odd Cows (Easy) bitmasks geometry math number theory *2300	0 / 0	8
	2025	P1548D2 Gregor and the Odd Cows (Hard) brute force geometry math number theory *3300	0 / 0	10
	2024	P1548E Gregor and the Two Painters data structures divide and conquer graphs greedy math *3400	0 / 0	10
	2022	P1549A Gregor and Cryptography math number theory *800	0 / 0	3
	2018	P1550A Find The Array greedy math *800	0 / 0	3
	2016	P1550B Maximum Cost Deletion greedy math *1000	0 / 0	3
	2013	P1550D Excellent Arrays binary search combinatorics constructive algorithms implementation math sortings two pointers *2300	0 / 0	8
	2007	P1551A Polycarp and Coins greedy math *800	0 / 0	3
	1999	P1551D1 Domino (easy version) constructive algorithms math *1700	0 / 0	5
	1997	P1551D2 Domino (hard version) constructive algorithms implementation math *2100	0 / 0	7
	1984	P1552D Array Differentiation bitmasks brute force constructive algorithms dfs and similar dp graphs math *1800	0 / 0	6
	1975	P1552I Organizing a Music Festival dfs and similar math *3400	0 / 0	10
	1973	P1553A Digits Sum math number theory *800	0 / 0	3
	1965	P1553E Permutation Shift brute force combinatorics constructive algorithms dfs and similar dsu graphs math *2100	0 / 0	7
	1964	P1553F Pairwise Modulo data structures math *2300	0 / 0	8
	1962	P1553G Common Divisor Graph brute force constructive algorithms dsu graphs hashing math number theory *2700	0 / 0	10
	1957	P1553I Stairs combinatorics divide and conquer dp fft math *3400	0 / 0	10
	1953	P1554B Cobb bitmasks brute force greedy math *1700	0 / 0	5
	1949	P1554E You dfs and similar dp math number theory *2600	0 / 0	10
	1948	P1555A PizzaForces brute force math *900	0 / 0	3
	1941	P1556A A Variety of Operations math *800	0 / 0	3
	1938	P1556D Take a Guess bitmasks constructive algorithms interactive math *1800	0 / 0	6
	1936	P1556F Sports Betting bitmasks combinatorics dp graphs math probabilities *2500	0 / 0	9
	1934	P1556H DIY Tree graphs greedy math probabilities *3300	0 / 0	10
	1933	P1557A Ezzat and Two Subsequences brute force math sortings *800	0 / 0	3
	1930	P1557C Moamen and XOR bitmasks combinatorics dp math matrices *1700	0 / 0	5
	1927	P1558A Charmed by the Game brute force math *1300	0 / 0	4
	1926	P1558B Up the Strip brute force dp math number theory two pointers *1900	0 / 0	6
	1921	P1559A Mocha and Math bitmasks constructive algorithms math *900	0 / 0	3
	1916	P1559E Mocha and Stars combinatorics dp fft math number theory *2200	0 / 0	8
	1913	P1560B Who's Opposite? math *800	0 / 0	3
	1911	P1560C Infinity Table implementation math *800	0 / 0	3
	1910	P1560D Make a Power of Two greedy math strings *1300	0 / 0	4
	1902	P1561D1 Up the Strip (simplified version) brute force data structures dp math number theory *1700	0 / 0	5
	1901	P1562A The Miracle and the Sleeper greedy math *800	0 / 0	3
	1900	P1562B Scenes From a Memory brute force constructive algorithms implementation math number theory *1000	0 / 0	3
	1899	P1562C Rings constructive algorithms math *1500	0 / 0	5
	1898	P1562D1 Two Hundred Twenty One (easy version) data structures dp math *1700	0 / 0	5
	1897	P1562D2 Two Hundred Twenty One (hard version) data structures math *2200	0 / 0	8
	1895	P1562F Tubular Bells interactive math number theory probabilities *2900	0 / 0	10
	1894	P1566A Median Maximization binary search greedy math *800	0 / 0	3
	1883	P1566H Xor-quiz constructive algorithms dp interactive math number theory *3200	0 / 0	10
	1878	P1567C Carrying Conundrum bitmasks combinatorics dp math *1600	0 / 0	5
	1875	P1567D Expression Evaluation Error constructive algorithms greedy implementation math *2000	0 / 0	7
	1874	P1567E Non-Decreasing Dilemma data structures divide and conquer math *2200	0 / 0	8
	1866	P1569C Jury Meeting combinatorics math *1500	0 / 0	5
	1856	P1571B Epic Novel special problem math 1300	0 / 0	4
	1852	P1571D Sweepstake special problem brute force constructive algorithms implementation math 1800	0 / 0	6
	1827	P1573B Swaps greedy math sortings *1400	0 / 0	4
	1823	P1574B Combinatorics Homework combinatorics greedy math *1100	0 / 0	3
	1817	P1574E Coloring combinatorics constructive algorithms implementation math *2500	0 / 0	9
	1803	P1575F Finding Expected Value math *2900	0 / 0	10
	1802	P1575G GCD Festival math number theory *2200	0 / 0	8
	1798	P1575K Knitting Batik implementation math *2200	0 / 0	8
	1788	P1578E Easy Scheduling implementation math *1200	0 / 0	4
	1785	P1578G Game of Chance math probabilities *3500	0 / 0	10
	1773	P1579A Casimir's String Solitaire math strings *800	0 / 0	3
	1769	P1579E1 Permutation Minimization by Deque constructive algorithms greedy math *1000	0 / 0	3
	1767	P1579F Array Stabilization (AND version) brute force graphs math number theory shortest paths *1700	0 / 0	5
	1760	P1580F Problems for Codeforces combinatorics fft math *3300	0 / 0	10
	1759	P1581A CQXYM Count Permutations combinatorics math number theory *800	0 / 0	3
	1758	P1581B Diameter of Graph constructive algorithms graphs greedy math *1200	0 / 0	4
	1757	P1582A Luntik and Concerts math *800	0 / 0	3
	1756	P1582B Luntik and Subsequences combinatorics math *900	0 / 0	3
	1754	P1582D Vupsen, Pupsen and 0 constructive algorithms math *1600	0 / 0	5
	1753	P1582E Pchelyonok and Segments binary search data structures dp greedy math *2000	0 / 0	7
	1747	P1583A Windblume Ode math number theory *800	0 / 0	3
	1735	P1583G Omkar and Time Travel data structures math *3000	0 / 0	10
	1733	P1584A Mathematical Addition math *800	0 / 0	3
	1732	P1584B Coloring Rectangles greedy math *1000	0 / 0	3
	1731	P1584C Two Arrays greedy math sortings *900	0 / 0	3
	1730	P1584D Guess the Permutation binary search combinatorics interactive math *2000	0 / 0	7
	1716	P1585D Yet Another Sorting Problem data structures math *1900	0 / 0	6
	1713	P1585F Non-equal Neighbours combinatorics dp math *2400	0 / 0	9
	1709	P1586I Omkar and Mosaic combinatorics constructive algorithms math *3500	0 / 0	10
	1707	P1592A Gamer Hemose binary search greedy math sortings *800	0 / 0	3
	1706	P1592B Hemose Shopping constructive algorithms dsu math sortings *1200	0 / 0	4
	1704	P1592D Hemose in ICPC ? binary search dfs and similar implementation interactive math number theory trees *2300	0 / 0	8
	1703	P1592E Bored Bakry bitmasks greedy math two pointers *2400	0 / 0	9
	1698	P1593A Elections math *800	0 / 0	3
	1696	P1593B Make it Divisible by 25 dfs and similar dp greedy math math *900	0 / 0	3
	1693	P1593D1 All are Same math number theory *1100	0 / 0	3
	1692	P1593D2 Half of Same brute force math number theory *1900	0 / 0	6
	1690	P1593F Red-Black Number dfs and similar dp implementation math meet-in-the-middle *2100	0 / 0	7
	1688	P1594A Consecutive Sum Riddle math *800	0 / 0	3
	1685	P1594B Special Numbers bitmasks math *1100	0 / 0	3
	1683	P1594C Make Them Equal brute force greedy math strings *1200	0 / 0	4
	1681	P1594E1 Rubik's Cube Coloring (easy version) combinatorics math *1300	0 / 0	4
	1680	P1594E2 Rubik's Cube Coloring (hard version) brute force dp implementation math trees *2300	0 / 0	8
	1678	P1594F Ideal Farm constructive algorithms math *2400	0 / 0	9
	1673	P1598C Delete Two Elements data structures dp implementation math two pointers *1200	0 / 0	4
	1671	P1598D Training Session combinatorics data structures geometry implementation math *1700	0 / 0	5
	1669	P1598E Staircases brute force combinatorics data structures dfs and similar dp implementation math *2100	0 / 0	7
	1666	P1598G The Sum of Good Numbers hashing math string suffix structures strings *3200	0 / 0	10
	1660	P1599C Bubble Strike combinatorics math probabilities ternary search *2000	0 / 0	7
	1653	P1599G Shortest path brute force geometry math shortest paths *2700	0 / 0	10
	1652	P1599H Hidden Fortress interactive math *2100	0 / 0	7
	1648	P1600F Party Organization brute force math probabilities *2300	0 / 0	8

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