bitmasks - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	4462	P1174D Ehab and the Expected XOR Problem bitmasks constructive algorithms *1900	0 / 0	6
	4388	P1185F Two Pizzas bitmasks brute force *2100	0 / 0	7
	4387	P1185G1 Playlist for Polycarp (easy version) bitmasks combinatorics dp *2100	0 / 0	7
	4346	P1194E Count The Rectangles bitmasks brute force data structures geometry sortings *2200	3 / 5	8
	4303	P1202A You Are Given Two Binary Strings... bitmasks greedy *1100	0 / 0	3
	4282	P1205B Shortest Cycle bitmasks brute force graphs shortest paths *1900	0 / 0	6
	4271	P1207E XOR Guessing bitmasks interactive math *1900	4 / 4	6
	4263	P1208F Bits And Pieces bitmasks dfs and similar dp greedy *2600	0 / 0	10
	4256	P1209E1 Rotate Columns (easy version) bitmasks brute force dp greedy sortings *2000	0 / 0	7
	4255	P1209E2 Rotate Columns (hard version) bitmasks dp greedy sortings *2500	0 / 0	9
	4219	P1214G Feeling Good bitmasks data structures *3200	0 / 0	10
	4213	P1215E Marbles bitmasks dp *2200	0 / 0	8
	4202	P1217C The Number Of Good Substrings binary search bitmasks brute force *1700	0 / 0	5
	4184	P1220D Alex and Julian bitmasks math number theory *1900	0 / 0	6
	4174	P1221G Graph And Numbers bitmasks brute force combinatorics dp meet-in-the-middle *2900	0 / 0	10
	4163	P1225C p-binary bitmasks brute force math *1600	0 / 0	5
	4159	P1225G To Make 1 bitmasks constructive algorithms dp greedy number theory *3100	0 / 0	10
	4133	P1234F Yet Another Substring Reverse bitmasks dp *2200	0 / 0	8
	4113	P1238E Keyboard Purchase bitmasks dp *2200	0 / 0	8
	4101	P1242C Sum Balance bitmasks dfs and similar dp graphs *2400	0 / 0	9
	4083	P1245F Daniel and Spring Cleaning bitmasks brute force combinatorics dp *2300	0 / 0	8
	3967	P1257F Make Them Similar bitmasks brute force hashing meet-in-the-middle *2400	0 / 0	9
	3951	P1261F Xor-Set bitmasks divide and conquer math *3100	0 / 0	10
	3859	P1270C Make Good bitmasks constructive algorithms math *1400	0 / 0	4
	3732	P1285D Dr bitmasks brute force dfs and similar divide and conquer dp greedy strings trees *1900	0 / 0	6
	3705	P1288D Minimax Problem binary search bitmasks dp *2000	0 / 0	7
	3677	P1292F Nora's Toy Boxes bitmasks combinatorics dp *3500	0 / 0	10
	3617	P1299D Around the World bitmasks combinatorics dfs and similar dp graphs graphs math trees *3000	0 / 0	10
	3602	P1302F Keep talking and nobody explodes – easy bitmasks brute force expression parsing	0 / 0	(None)
	3594	P1303D Fill The Bag bitmasks greedy *1900	0 / 0	6
	3577	P1305G Kuroni and Antihype bitmasks brute force dp dsu graphs *3500	0 / 0	10
	3540	P1312C Adding Powers bitmasks greedy implementation math number theory ternary search *1400	0 / 0	4
	3531	P1313D Happy New Year bitmasks dp implementation *2500	0 / 0	9
	3515	P1316E Team Building bitmasks dp greedy sortings *2300	0 / 7	8
	3496	P1322B Present binary search bitmasks constructive algorithms data structures math sortings *2100	0 / 0	7
	3491	P1322D Reality Show bitmasks dp *2800	0 / 0	10
	3471	P1325D Ehab the Xorcist bitmasks constructive algorithms greedy number theory *1700	0 / 0	5
	3455	P1326F1 Wise Men (Easy Version) bitmasks brute force dp meet-in-the-middle *2600	0 / 0	10
	3453	P1326F2 Wise Men (Hard Version) bitmasks dp math *3200	0 / 0	10
	3445	P1327F AND Segments bitmasks combinatorics data structures dp two pointers *2500	0 / 0	9
	3443	P1327G Letters and Question Marks bitmasks dp string suffix structures *2800	0 / 0	10
	3427	P1329B Dreamoon Likes Sequences bitmasks combinatorics math *1700	0 / 0	5
	3412	P1331C ...And after happily lived ever they *special problem bitmasks	0 / 0	(None)
	3395	P1332D Walk on Matrix bitmasks constructive algorithms math *1700	0 / 0	5
	3374	P1334G Substring Search bitmasks brute force fft *2900	0 / 0	10
	3357	P1336E1 Chiori and Doll Picking (easy version) bitmasks brute force combinatorics math *2700	0 / 0	10
	3356	P1336E2 Chiori and Doll Picking (hard version) bitmasks brute force combinatorics math *3500	0 / 0	10
	3351	P1338B Edge Weight Assignment bitmasks constructive algorithms dfs and similar greedy math trees *1800	0 / 0	6
	3350	P1338C Perfect Triples bitmasks brute force constructive algorithms divide and conquer math *2200	0 / 0	8
	3344	P1340B Nastya and Scoreboard bitmasks dp graphs greedy *1700	0 / 0	5
	3332	P1342F Make It Ascending bitmasks brute force dp *3000	0 / 0	10
	3218	P1360F Spy-string bitmasks brute force constructive algorithms dp hashing strings *1700	0 / 0	5
	3216	P1360H Binary Median binary search bitmasks brute force constructive algorithms *2100	0 / 0	7
	3213	P1361C Johnny and Megan's Necklace binary search bitmasks constructive algorithms dfs and similar dsu graphs *2500	0 / 0	9
	3208	P1362B Johnny and His Hobbies bitmasks brute force *1200	0 / 0	4
	3207	P1362C Johnny and Another Rating Drop bitmasks greedy math *1400	0 / 0	4
	3196	P1364E X-OR bitmasks constructive algorithms divide and conquer interactive probabilities *2700	0 / 0	10
	3189	P1365G Secure Password bitmasks combinatorics constructive algorithms interactive math *2800	0 / 0	10
	3171	P1368D AND, OR and square sum bitmasks greedy math *1700	0 / 0	5
	3093	P1383B GameGame bitmasks constructive algorithms dp games greedy math *1900	0 / 0	6
	3092	P1383C String Transformation 2 bitmasks dp graphs trees *3100	0 / 0	10
	3082	P1385D a-Good String bitmasks brute force divide and conquer dp implementation *1500	0 / 0	5
	3076	P1386C Joker special problem bitmasks data structures divide and conquer dsu 2800	0 / 0	10
	3056	P1391D 505 bitmasks brute force constructive algorithms dp greedy implementation *2000	0 / 0	7
	3050	P1392E Omkar and Duck bitmasks constructive algorithms interactive math *2100	0 / 0	7
	3048	P1392G Omkar and Pies bitmasks dfs and similar dp math shortest paths *2900	0 / 0	10
	3032	P1395C Boboniu and Bit Operations bitmasks brute force dp greedy *1600	0 / 0	5
	3018	P1398G Running Competition bitmasks fft math number theory *2600	0 / 0	10
	3004	P1400G Mercenaries bitmasks brute force combinatorics dp dsu math two pointers *2600	0 / 0	10
	2998	P1401F Reverse and Swap binary search bitmasks data structures *2400	0 / 0	9
	2955	P1411E Poman Numbers bitmasks greedy math strings *2300	0 / 0	8
	2953	P1411G No Game No Life bitmasks games math matrices *2700	0 / 0	10
	2943	P1415D XOR-gun bitmasks brute force constructive algorithms *2000	0 / 0	7
	2938	P1416C XOR Inverse bitmasks data structures divide and conquer dp greedy math sortings strings trees *2000	0 / 0	7
	2917	P1420B Rock and Lever bitmasks math *1200	0 / 0	4
	2912	P1421A XORwice bitmasks greedy math *800	0 / 0	3
	2893	P1423I Lookup Tables bitmasks *3000	0 / 0	10
	2892	P1423J Bubble Cup hypothesis bitmasks constructive algorithms dp math *2400	0 / 0	9
	2867	P1427E Xum bitmasks constructive algorithms math matrices number theory *2500	0 / 0	9
	2848	P1430G Yet Another DAG Problem bitmasks dfs and similar dp flows graphs math *2600	0 / 0	10
	2813	P1438D Powerful Ksenia bitmasks constructive algorithms math *2200	0 / 0	8
	2812	P1438E Yurii Can Do Everything binary search bitmasks brute force constructive algorithms divide and conquer two pointers *2500	0 / 0	9
	2805	P1439E Cheat and Win bitmasks data structures games trees *3500	0 / 0	10
	2783	P1446C Xor Tree binary search bitmasks data structures divide and conquer dp trees *2100	0 / 0	7
	2769	P1450G Communism bitmasks dp trees *3500	0 / 0	10
	2762	P1451E1 Bitwise Queries (Easy Version) bitmasks constructive algorithms interactive math *2000	0 / 0	7
	2761	P1451E2 Bitwise Queries (Hard Version) bitmasks constructive algorithms interactive math *2300	0 / 0	8
	2698	P1463B Find The Array bitmasks constructive algorithms greedy *1400	0 / 0	4
	2690	P1463F Max Correct Set bitmasks dp math *3100	0 / 1	10
	2681	P1466E Apollo versus Pan bitmasks brute force math *1800	0 / 0	6
	2680	P1466F Euclid's nightmare bitmasks dfs and similar dsu graphs greedy math sortings *2100	0 / 0	7
	2631	P1469E A Bit Similar bitmasks brute force hashing string suffix structures strings two pointers *2400	0 / 0	9
	2624	P1470B Strange Definition bitmasks graphs hashing math number theory *1900	0 / 0	6
	2568	P1476E Pattern Matching bitmasks data structures dfs and similar graphs hashing sortings strings *2300	0 / 0	8
	2537	P1479C Continuous City bitmasks constructive algorithms *2500	0 / 0	9
	2535	P1479D Odd Mineral Resource binary search bitmasks brute force data structures probabilities trees *2900	0 / 0	10
	2452	P1491D Zookeeper and The Infinite Zoo bitmasks constructive algorithms dp greedy math *1800	0 / 0	6
	2437	P1492D Genius's Gambit bitmasks constructive algorithms greedy math *1900	0 / 0	6
	2431	P1493E Enormous XOR bitmasks constructive algorithms greedy math strings two pointers *2600	0 / 0	10
	2430	P1493F Enchanted Matrix bitmasks interactive number theory *2600	0 / 0	10

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