math - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	1331	P1648B Integral Array brute force constructive algorithms data structures math *1800	0 / 0	6
	1323	P1650B DIV + MOD math *900	0 / 0	3
	1321	P1650D Twist the Permutation brute force constructive algorithms implementation math *1300	0 / 0	4
	1320	P1650E Rescheduling the Exam binary search data structures greedy implementation math sortings *1900	0 / 0	6
	1313	P1651E Sum of Matchings brute force combinatorics constructive algorithms dfs and similar graph matchings greedy math *2600	0 / 0	10
	1308	P1654D Potion Brewing Class dfs and similar math number theory trees *2100	0 / 0	7
	1307	P1654E Arithmetic Operations brute force data structures graphs math *2300	0 / 0	8
	1304	P1654H Three Minimums combinatorics constructive algorithms divide and conquer dp fft math *3500	0 / 0	10
	1303	P1656A Good Pairs math sortings *800	0 / 0	3
	1302	P1656B Subtract Operation data structures greedy math two pointers *1100	0 / 0	3
	1301	P1656C Make Equal With Mod constructive algorithms math number theory sortings *1200	0 / 0	4
	1300	P1656D K-good constructive algorithms math number theory *1900	0 / 0	6
	1299	P1656E Equal Tree Sums constructive algorithms dfs and similar math trees *2200	0 / 0	8
	1298	P1656F Parametric MST binary search constructive algorithms graphs greedy math sortings *2600	0 / 0	10
	1297	P1656G Cycle Palindrome constructive algorithms graphs math *3200	0 / 0	10
	1296	P1656H Equal LCM Subsets data structures math number theory *3200	0 / 0	10
	1294	P1657A Integer Moves brute force math *800	0 / 0	3
	1291	P1657D For Gamers binary search brute force greedy math sortings *2000	0 / 0	7
	1290	P1657E Star MST combinatorics dp graph matchings math *2200	0 / 0	8
	1288	P1658A Marin and Photoshoot constructive algorithms implementation math *800	0 / 0	3
	1287	P1658B Marin and Anti-coprime Permutation combinatorics math number theory *800	0 / 0	3
	1286	P1658C Shinju and the Lost Permutation constructive algorithms math *1700	0 / 0	5
	1285	P1658D1 388535 (Easy Version) bitmasks math *1600	0 / 0	5
	1284	P1658D2 388535 (Hard Version) bitmasks brute force data structures math *2300	0 / 0	8
	1283	P1658E Gojou and Matrix Game data structures dp games hashing implementation math number theory sortings *2500	0 / 0	9
	1282	P1658F Juju and Binary String brute force constructive algorithms greedy math *2700	0 / 0	10
	1281	P1659A Red Versus Blue constructive algorithms greedy implementation math *1000	0 / 0	3
	1279	P1659C Line Empire binary search brute force dp greedy implementation math *1500	0 / 0	5
	1278	P1659D Reverse Sort Sum constructive algorithms data structures greedy implementation math two pointers *1900	0 / 0	6
	1275	P1660A Vasya and Coins greedy math *800	0 / 0	3
	1274	P1660B Vlad and Candies math *800	0 / 0	3
	1272	P1660D Maximum Product Strikes Back brute force implementation math two pointers *1600	0 / 0	5
	1270	P1660F1 Promising String (easy version) brute force implementation math strings *1700	0 / 0	5
	1269	P1660F2 Promising String (hard version) data structures implementation math strings *2100	0 / 0	7
	1268	P1661A Array Balancing greedy math *800	0 / 0	3
	1266	P1661C Water the Trees binary search greedy math *1700	0 / 0	5
	1264	P1661E Narrow Components brute force data structures dp dsu math trees *2500	1 / 9	9
	1260	P1662C European Trip dp graphs math matrices	0 / 0	(None)
	1258	P1662E Round Table math	0 / 0	(None)
	1255	P1662H Boundary brute force math	0 / 0	(None)
	1251	P1662L Il Derby della Madonnina data structures dp math	0 / 0	(None)
	1249	P1662N Drone Photo combinatorics math sortings	0 / 0	(None)
	1246	P1663B Mike's Sequence *special problem divide and conquer implementation math	0 / 0	(None)
	1245	P1663C Pōja Verdon *special problem implementation math	0 / 0	(None)
	1244	P1663D Is it rated - 3 *special problem combinatorics dp math	0 / 0	(None)
	1239	P1665A GCD vs LCM constructive algorithms math *800	0 / 0	3
	1236	P1665D GCD Guess bitmasks chinese remainder theorem constructive algorithms games interactive math number theory *2000	0 / 0	7
	1230	P1666E Even Split binary search constructive algorithms greedy math *2500	0 / 0	9
	1226	P1666I Interactive Treasure Hunt brute force constructive algorithms geometry interactive math *2200	0 / 0	8
	1222	P1667A Make it Increasing brute force greedy math *1300	0 / 0	4
	1220	P1667C Half Queen Cover constructive algorithms math *2400	0 / 0	9
	1218	P1667E Centroid Probabilities combinatorics dp fft math *3000	0 / 0	10
	1216	P1668A Direction Change implementation math *800	0 / 0	3
	1215	P1668B Social Distance greedy math sortings *900	0 / 0	3
	1212	P1669C Odd/Even Increments greedy greedy implementation math *800	0 / 0	3
	1210	P1669E 2-Letter Strings data structures math strings *1200	0 / 0	4
	1207	P1669H Maximal AND bitmasks greedy math *1300	0 / 0	4
	1204	P1670C Where is the Pizza? data structures dfs and similar dsu graphs implementation math *1400	0 / 0	4
	1203	P1670D Very Suspicious binary search brute force geometry greedy implementation math *1700	0 / 0	5
	1199	P1671B Consecutive Points Segment brute force math sortings *1000	0 / 0	3
	1198	P1671C Dolce Vita binary search brute force greedy math *1200	0 / 0	4
	1195	P1671F Permutation Counting brute force combinatorics dp fft math *2700	0 / 0	10
	1194	P1672A Log Chopping games implementation math *800	0 / 0	3
	1187	P1672G Cross Xor constructive algorithms graphs math matrices *3200	0 / 0	10
	1182	P1673C Palindrome Basis brute force dp math number theory *1500	0 / 0	5
	1181	P1673D Lost Arithmetic Progression combinatorics math number theory *1900	0 / 0	6
	1180	P1673E Power or XOR? bitmasks combinatorics math number theory *2500	0 / 0	9
	1179	P1673F Anti-Theft Road Planning bitmasks constructive algorithms divide and conquer greedy interactive math *2400	0 / 0	9
	1178	P1674A Number Transformation constructive algorithms math *800	0 / 0	3
	1177	P1674B Dictionary combinatorics math *800	0 / 0	3
	1174	P1674E Breaking the Wall binary search brute force constructive algorithms greedy math *2000	0 / 0	7
	1171	P1675A Food for Animals greedy math *800	0 / 0	3
	1163	P1676B Equal Candies greedy math sortings *800	0 / 0	3
	1162	P1676C Most Similar Words brute force greedy implementation implementation math strings *800	0 / 0	3
	1154	P1677B Tokitsukaze and Meeting data structures implementation math *1700	0 / 0	5
	1152	P1677D Tokitsukaze and Permutations dp math *2500	0 / 0	9
	1150	P1677F Tokitsukaze and Gems dp math *3500	0 / 0	10
	1146	P1679A AvtoBus brute force greedy math number theory *900	0 / 0	3
	1141	P1679F Formalism for Formalism bitmasks dp math *2600	0 / 0	10
	1140	P1680A Minimums and Maximums brute force math *800	0 / 0	3
	1137	P1680D Dog Walking brute force greedy math *2400	0 / 0	9
	1133	P1681B Card Trick implementation math *800	0 / 0	3
	1126	P1682C LIS or Reverse LIS? constructive algorithms greedy implementation math *1400	0 / 0	4
	1124	P1682E Unordered Swaps constructive algorithms dfs and similar graphs greedy math sortings trees *2700	0 / 0	10
	1122	P1684A Digit Minimization constructive algorithms games math strings *800	0 / 0	3
	1121	P1684B Z mod X = C constructive algorithms math *800	0 / 0	3
	1116	P1684G Euclid Guess constructive algorithms flows graph matchings math number theory *2800	0 / 0	10
	1114	P1684H Hard Cut constructive algorithms dfs and similar divide and conquer math *3400	0 / 0	10
	1090	P1687D Cute number binary search brute force data structures dsu implementation math *2900	0 / 0	10
	1088	P1687E Become Big For Me combinatorics constructive algorithms greedy math number theory *3500	0 / 0	10
	1087	P1687F Koishi's Unconscious Permutation fft math *3500	0 / 0	10
	1064	P1690E Price Maximization binary search greedy math two pointers *1500	0 / 0	5
	1063	P1690F Shifting String graphs math number theory strings *1700	0 / 0	5
	1061	P1691A Beat The Odds brute force greedy math *800	0 / 0	3
	1059	P1691C Sum of Substrings brute force constructive algorithms greedy math strings *1400	0 / 0	4
	1056	P1691F K-Set Tree combinatorics dfs and similar dp math trees *2500	0 / 0	9
	1050	P1692F 3SUM brute force math *1300	0 / 0	4
	1048	P1692H Gambling data structures dp greedy math *1700	0 / 0	5
	1026	P1696C Fishingprince Plays With Array constructive algorithms greedy implementation math *1400	0 / 0	4
	1021	P1696E Placing Jinas combinatorics math *2000	0 / 0	7

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