two pointers - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	2581	P1475D Cleaning the Phone binary search dp sortings two pointers *1800	0 / 0	6
	2564	P1476G Minimum Difference data structures hashing sortings two pointers *3100	0 / 0	10
	2491	P1487E Cheap Dinner brute force data structures graphs greedy implementation sortings two pointers *2000	0 / 0	7
	2438	P1492C Maximum width binary search data structures dp greedy two pointers *1500	0 / 0	5
	2432	P1493D GCD of an Array brute force data structures hashing implementation math number theory sortings two pointers *2100	1 / 2	7
	2431	P1493E Enormous XOR bitmasks constructive algorithms greedy math strings two pointers *2600	0 / 0	10
	2424	P1494C 1D Sokoban binary search dp greedy implementation two pointers *1900	0 / 0	6
	2396	P1497E1 Square-Free Division (easy version) data structures dp greedy math number theory two pointers *1700	0 / 0	5
	2394	P1497E2 Square-Free Division (hard version) data structures dp greedy math number theory two pointers *2500	0 / 0	9
	2368	P1500C Matrix Sorting bitmasks brute force constructive algorithms greedy two pointers *2600	0 / 0	10
	2366	P1500D Tiles for Bathroom data structures sortings two pointers *2900	0 / 0	10
	2354	P1503C Travelling Salesman Problem binary search data structures dp greedy shortest paths sortings two pointers *2200	0 / 0	8
	2353	P1503D Flip the Cards 2-sat constructive algorithms data structures greedy sortings two pointers *2600	0 / 0	10
	2327	P1508A Binary Literature constructive algorithms greedy implementation strings two pointers *1900	0 / 0	6
	2289	P1511G Chips on a Board bitmasks brute force data structures dp games two pointers *2700	0 / 20	10
	2264	P1514E Baby Ehab's Hyper Apartment binary search graphs interactive sortings two pointers *2700	0 / 0	10
	2260	P1515D Phoenix and Socks greedy sortings two pointers *1500	0 / 0	5
	2245	P1516D Cut binary search data structures dp graphs number theory two pointers *2100	0 / 0	7
	2232	P1517E Group Photo binary search data structures implementation two pointers *2500	0 / 0	9
	2225	P1519D Maximum Sum of Products brute force dp implementation math two pointers *1600	0 / 0	5
	2190	P1525E Assimilation IV combinatorics dp math probabilities two pointers *2100	0 / 0	7
	2107	P1535C Unstable String binary search dp greedy implementation strings two pointers *1400	0 / 0	4
	2087	P1537E1 Erase and Extend (Easy Version) binary search brute force dp greedy hashing implementation string suffix structures strings two pointers *1600	0 / 0	5
	2086	P1537E2 Erase and Extend (Hard Version) binary search data structures greedy hashing string suffix structures strings two pointers *2200	0 / 0	8
	2082	P1538C Number of Pairs binary search data structures math two pointers *1300	0 / 0	4
	2074	P1539D PriceFixed binary search greedy implementation sortings two pointers *1600	0 / 0	5
	2039	P1547C Pair Programming greedy two pointers *1100	0 / 0	3
	2036	P1547E Air Conditioners data structures dp implementation shortest paths sortings two pointers *1500	0 / 0	5
	2035	P1547F Array Stabilization (GCD version) binary search brute force data structures divide and conquer number theory two pointers *1900	0 / 0	6
	2028	P1548B Integers Have Friends binary search data structures divide and conquer math number theory two pointers *1800	0 / 0	6
	2013	P1550D Excellent Arrays binary search combinatorics constructive algorithms implementation math sortings two pointers *2300	0 / 0	8
	2011	P1550E Stringforces binary search bitmasks brute force dp strings two pointers *2500	0 / 0	9
	1967	P1553D Backspace dp greedy strings two pointers *1500	0 / 0	5
	1943	P1555E Boring Segments data structures sortings trees two pointers *2100	0 / 0	7
	1935	P1556G Gates to Another World bitmasks data structures dsu two pointers *3300	0 / 0	10
	1926	P1558B Up the Strip brute force dp math number theory two pointers *1900	0 / 0	6
	1917	P1559D2 Mocha and Diana (Hard Version) brute force constructive algorithms dfs and similar dsu graphs greedy trees two pointers *2500	0 / 0	9
	1890	P1566D2 Seating Arrangements (hard version) data structures greedy implementation sortings two pointers *1600	0 / 0	5
	1863	P1569D Inconvenient Pairs binary search data structures implementation sortings two pointers *1900	0 / 0	6
	1837	P1572B Xor of 3 brute force constructive algorithms greedy two pointers *2500	0 / 0	9
	1755	P1582C Grandma Capa Knits a Scarf brute force data structures greedy strings two pointers *1200	0 / 0	4
	1750	P1582F2 Korney Korneevich and XOR (hard version) binary search brute force dp greedy two pointers *2400	0 / 0	9
	1708	P1588F Jumping Through the Array binary search data structures graphs two pointers *3500	0 / 0	10
	1703	P1592E Bored Bakry bitmasks greedy math two pointers *2400	0 / 0	9
	1673	P1598C Delete Two Elements data structures dp implementation math two pointers *1200	0 / 0	4
	1663	P1599A Weights constructive algorithms greedy two pointers *2600	0 / 0	10
	1649	P1600E Array Game games greedy two pointers *1900	0 / 0	6
	1642	P1601B Frog Traveler data structures dfs and similar dp graphs shortest paths two pointers *1900	0 / 0	6
	1619	P1605E Array Equalizer binary search greedy implementation math number theory sortings two pointers *2400	0 / 0	9
	1598	P1607H Banquet Preparations 2 greedy sortings two pointers *2200	0 / 0	8
	1592	P1608C Game Master data structures dfs and similar dp graphs greedy two pointers *1700	0 / 0	5
	1578	P1609C Complex Market Analysis binary search dp implementation number theory schedules two pointers *1400	0 / 0	4
	1574	P1609F Interesting Sections data structures divide and conquer meet-in-the-middle two pointers *2800	0 / 0	10
	1570	P1610B Kalindrome Array greedy two pointers *1100	0 / 0	3
	1558	P1611E1 Escape The Maze (easy version) dfs and similar greedy shortest paths trees two pointers *1700	0 / 0	5
	1556	P1611F ATM and Students binary search data structures two pointers *1800	0 / 0	6
	1499	P1619H Permutation and Queries brute force data structures divide and conquer two pointers *2400	0 / 0	9
	1479	P1622D Shuffle combinatorics math two pointers *2000	0 / 0	7
	1456	P1626C Monsters And Spells binary search data structures dp greedy implementation math two pointers *1700	0 / 0	5
	1446	P1627E Not Escaping data structures dp implementation shortest paths two pointers *2200	0 / 0	8
	1441	P1628A Meximum Array binary search constructive algorithms greedy implementation math two pointers *1400	0 / 0	4
	1421	P1630B Range and Partition binary search constructive algorithms data structures greedy two pointers *1800	0 / 0	6
	1419	P1630C Paint the Middle dp greedy sortings two pointers *2200	0 / 0	8
	1404	P1632D New Year Concert binary search data structures greedy math number theory two pointers *2000	0 / 0	7
	1370	P1638F Two Posters brute force data structures greedy two pointers *3200	0 / 0	10
	1355	P1641D Two Arrays bitmasks brute force combinatorics greedy hashing math two pointers *2700	0 / 1	10
	1343	P1646B Quality vs Quantity brute force constructive algorithms greedy sortings two pointers *800	0 / 0	3
	1302	P1656B Subtract Operation data structures greedy math two pointers *1100	0 / 0	3
	1278	P1659D Reverse Sort Sum constructive algorithms data structures greedy implementation math two pointers *1900	0 / 0	6
	1272	P1660D Maximum Product Strikes Back brute force implementation math two pointers *1600	0 / 0	5
	1235	P1665E MinimizOR bitmasks brute force data structures divide and conquer greedy implementation two pointers *2500	0 / 0	9
	1209	P1669F Eating Candies binary search data structures greedy two pointers *1100	0 / 0	3
	1191	P1672D Cyclic Rotation constructive algorithms greedy implementation two pointers *1700	0 / 0	5
	1159	P1676F Longest Strike data structures greedy implementation sortings two pointers *1300	0 / 0	4
	1138	P1680C Binary String binary search greedy strings two pointers *1600	1 / 1	5
	1123	P1682F MCMF? data structures flows graphs greedy sortings two pointers *2700	0 / 0	10
	1118	P1684E MEX vs DIFF binary search brute force constructive algorithms data structures greedy two pointers *2100	0 / 0	7
	1117	P1684F Diverse Segments data structures two pointers *2600	0 / 0	10
	1078	P1689A Lex String brute force greedy implementation sortings two pointers *800	0 / 0	3
	1065	P1690D Black and White Stripe implementation two pointers *1000	0 / 0	3
	1064	P1690E Price Maximization binary search greedy math two pointers *1500	0 / 0	5
	1060	P1691B Shoe Shuffling constructive algorithms greedy implementation two pointers *1000	0 / 0	3
	1058	P1691D Max GEQ Sum binary search constructive algorithms data structures divide and conquer implementation two pointers *1800	0 / 0	6
	1051	P1692E Binary Deque binary search implementation two pointers *1200	0 / 0	4
	1049	P1692G 2^Sort data structures dp sortings two pointers *1400	0 / 0	4
	1042	P1693F I Might Be Wrong binary search greedy two pointers *3400	0 / 0	10
	1016	P1696H Maximum Product? brute force combinatorics dp greedy implementation math two pointers *3500	0 / 0	10
	1010	P1697C awoo's Favorite Problem binary search constructive algorithms data structures greedy implementation strings two pointers *1400	0 / 0	4
	993	P1698E PermutationForces II brute force combinatorics greedy sortings trees two pointers *2300	0 / 0	8
	982	P1699E Three Days Grace data structures dp greedy math number theory two pointers *2600	0 / 0	10
	973	P1701C Schedule Management binary search greedy implementation two pointers *1400	0 / 0	4
	972	P1701D Permutation Restoration binary search data structures greedy math sortings two pointers *1900	0 / 0	6
	935	P1706D2 Chopping Carrots (Hard Version) brute force constructive algorithms data structures dp greedy math number theory two pointers *2400	0 / 0	9
	908	P1712E1 LCM Sum (easy version) binary search brute force combinatorics math number theory two pointers *2300	0 / 0	8
	907	P1712E2 LCM Sum (hard version) brute force data structures math number theory two pointers *2500	0 / 0	9
	865	P1719C Fighting Tournament binary search data structures implementation two pointers *1400	0 / 0	4
	861	P1720D1 Xor-Subsequence (easy version) bitmasks brute force dp strings trees two pointers *1800	0 / 0	6
	856	P1721C Min-Max Array Transformation binary search greedy two pointers *1400	0 / 0	4
	843	P1725C Circular Mirror binary search combinatorics geometry math two pointers *2000	0 / 0	7
	821	P1728D Letter Picking constructive algorithms dp games two pointers *1800	0 / 0	6

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