Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	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
	1280	P1659B Bit Flipping bitmasks constructive algorithms greedy strings *1300	0 / 0	4
	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
	1277	P1659E AND-MEX Walk bitmasks brute force constructive algorithms dfs and similar dsu graphs *2200	0 / 0	8
	1276	P1659F Tree and Permutation Game dfs and similar games graphs trees *3000	0 / 0	10
	1275	P1660A Vasya and Coins greedy math *800	0 / 0	3
	1274	P1660B Vlad and Candies math *800	0 / 0	3
	1273	P1660C Get an Even String dp greedy strings *1300	0 / 0	4
	1272	P1660D Maximum Product Strikes Back brute force implementation math two pointers *1600	0 / 0	5
	1271	P1660E Matrix and Shifts brute force constructive algorithms greedy implementation *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
	1267	P1661B Getting Zero bitmasks brute force dfs and similar dp graphs greedy shortest paths *1300	0 / 0	4
	1266	P1661C Water the Trees binary search greedy math *1700	0 / 0	5
	1265	P1661D Progressions Covering data structures greedy *1900	0 / 0	6
	1264	P1661E Narrow Components brute force data structures dp dsu math trees *2500	1 / 9	9
	1263	P1661F Teleporters binary search greedy *2600	0 / 0	10
	1262	P1662A Organizing SWERC brute force implementation	0 / 0	(None)
	1261	P1662B Toys greedy strings	0 / 0	(None)
	1260	P1662C European Trip dp graphs math matrices	0 / 0	(None)
	1259	P1662D Evolution of Weasels greedy implementation strings	0 / 0	(None)
	1258	P1662E Round Table math	0 / 0	(None)
	1257	P1662F Antennas data structures dfs and similar graphs graphs implementation implementation shortest paths shortest paths	0 / 0	(None)
	1256	P1662G Gastronomic Event dp greedy trees	0 / 0	(None)
	1255	P1662H Boundary brute force math	0 / 0	(None)
	1254	P1662I Ice Cream Shop brute force implementation sortings	0 / 0	(None)
	1253	P1662J Training Camp flows graphs	0 / 0	(None)
	1252	P1662K Pandemic Restrictions geometry ternary search	0 / 0	(None)
	1251	P1662L Il Derby della Madonnina data structures dp math	0 / 0	(None)
	1250	P1662M Bottle Arrangements constructive algorithms	0 / 0	(None)
	1249	P1662N Drone Photo combinatorics math sortings	0 / 0	(None)
	1248	P1662O Circular Maze brute force dfs and similar graphs implementation	0 / 0	(None)
	1247	P1663A Who Tested? *special problem expression parsing trees	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)
	1243	P1663E Are You Safe? *special problem implementation	0 / 0	(None)
	1242	P1663F In Every Generation... *special problem strings	0 / 0	(None)
	1241	P1663G Six Characters *special problem constructive algorithms strings	0 / 0	(None)
	1240	P1663H Cross-Language Program *special problem constructive algorithms	0 / 0	(None)
	1239	P1665A GCD vs LCM constructive algorithms math *800	0 / 0	3
	1238	P1665B Array Cloning Technique constructive algorithms greedy sortings *900	0 / 0	3
	1237	P1665C Tree Infection binary search greedy sortings trees *1600	0 / 0	5
	1236	P1665D GCD Guess bitmasks chinese remainder theorem constructive algorithms games interactive math number theory *2000	0 / 0	7
	1235	P1665E MinimizOR bitmasks brute force data structures divide and conquer greedy implementation two pointers *2500	0 / 0	9
	1234	P1666A Admissible Map *3300	0 / 0	10
	1233	P1666B Budget Distribution *3300	0 / 0	10
	1232	P1666C Connect the Points brute force constructive algorithms geometry *1800	0 / 0	6
	1231	P1666D Deletive Editing greedy *900	0 / 0	3
	1230	P1666E Even Split binary search constructive algorithms greedy math *2500	0 / 0	9
	1229	P1666F Fancy Stack combinatorics dp implementation *2200	0 / 0	8
	1228	P1666G __NO_TITLE__	0 / 0	(None)
	1227	P1666H __NO_TITLE__	0 / 0	(None)
	1226	P1666I Interactive Treasure Hunt brute force constructive algorithms geometry interactive math *2200	0 / 0	8
	1225	P1666J Job Lookup constructive algorithms dp shortest paths trees *2100	0 / 0	7
	1224	P1666K Kingdom Partition flows *3200	0 / 0	10
	1223	P1666L Labyrinth dfs and similar graphs *1800	0 / 0	6
	1222	P1667A Make it Increasing brute force greedy math *1300	0 / 0	4
	1221	P1667B Optimal Partition data structures dp *2100	0 / 0	7
	1220	P1667C Half Queen Cover constructive algorithms math *2400	0 / 0	9
	1219	P1667D Edge Elimination constructive algorithms dfs and similar dp trees *2900	0 / 0	10
	1218	P1667E Centroid Probabilities combinatorics dp fft math *3000	0 / 0	10
	1217	P1667F Yin Yang implementation *3500	0 / 0	10
	1216	P1668A Direction Change implementation math *800	0 / 0	3
	1215	P1668B Social Distance greedy math sortings *900	0 / 0	3
	1214	P1669A Division? implementation *800	0 / 0	3
	1213	P1669B Triple implementation sortings *800	0 / 0	3
	1212	P1669C Odd/Even Increments greedy greedy implementation math *800	0 / 0	3
	1211	P1669D Colorful Stamp implementation *1100	0 / 0	3
	1210	P1669E 2-Letter Strings data structures math strings *1200	0 / 0	4
	1209	P1669F Eating Candies binary search data structures greedy two pointers *1100	0 / 0	3
	1208	P1669G Fall Down dfs and similar implementation *1200	0 / 0	4
	1207	P1669H Maximal AND bitmasks greedy math *1300	0 / 0	4
	1206	P1670A Prof greedy implementation sortings *800	0 / 0	3
	1205	P1670B Dorms War brute force implementation strings *1100	0 / 0	3
	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
	1202	P1670E Hemose on the Tree bitmasks constructive algorithms dfs and similar trees *2200	0 / 0	8
	1201	P1670F Jee, You See? bitmasks combinatorics dp *2400	0 / 0	9
	1200	P1671A String Building implementation *800	0 / 0	3
	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
	1197	P1671D Insert a Progression brute force constructive algorithms greedy *1600	0 / 0	5
	1196	P1671E Preorder combinatorics divide and conquer dp dsu hashing sortings trees *2100	0 / 0	7
	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
	1193	P1672B I love AAAB constructive algorithms implementation *800	0 / 0	3
	1192	P1672C Unequal Array constructive algorithms greedy implementation *1100	0 / 0	3
	1191	P1672D Cyclic Rotation constructive algorithms greedy implementation two pointers *1700	0 / 0	5
	1190	P1672E notepad.exe binary search constructive algorithms greedy interactive *2200	0 / 0	8
	1189	P1672F1 Array Shuffling constructive algorithms graphs greedy *2000	0 / 0	7
	1188	P1672F2 Checker for Array Shuffling constructive algorithms dfs and similar graphs *2800	0 / 0	10

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