combinatorics - Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	3819	P1276C Beautiful Rectangle brute force combinatorics constructive algorithms data structures greedy math *2300	0 / 0	8
	3795	P1278F Cards combinatorics dp math number theory probabilities *2600	0 / 0	10
	3788	P1279D Santa's Bot combinatorics math probabilities *1700	0 / 0	5
	3785	P1279E New Year Permutations combinatorics dp *2700	0 / 0	10
	3771	P1280F Intergalactic Sliding Puzzle combinatorics constructive algorithms math *3400	0 / 0	10
	3745	P1284B New Year and Ascent Sequence binary search combinatorics data structures dp implementation sortings *1400	0 / 0	4
	3744	P1284C New Year and Permutation combinatorics math *1600	0 / 0	5
	3741	P1284E New Year and Castle Construction combinatorics geometry math sortings *2500	0 / 0	9
	3727	P1285F Classical? binary search combinatorics number theory *2900	0 / 0	10
	3708	P1288C Two Arrays combinatorics dp *1600	0 / 0	5
	3680	P1292C Xenon's Attack on the Gangs combinatorics dfs and similar dp greedy trees *2300	0 / 0	8
	3677	P1292F Nora's Toy Boxes bitmasks combinatorics dp *3500	0 / 0	10
	3675	P1293B JOE is on TV! combinatorics greedy math *1000	0 / 0	3
	3657	P1295F Good Contest combinatorics dp probabilities *2700	0 / 0	10
	3617	P1299D Around the World bitmasks combinatorics dfs and similar dp graphs graphs math trees *3000	0 / 0	10
	3611	P1301C Ayoub's function binary search combinatorics greedy math strings *1700	0 / 0	5
	3581	P1305C Kuroni and Impossible Calculation brute force combinatorics math number theory *1600	0 / 0	5
	3571	P1307E Cow and Treats binary search combinatorics dp greedy implementation math *2500	0 / 0	9
	3539	P1312D Count the Arrays combinatorics math *1700	0 / 0	5
	3463	P1326C Permutation Partitions combinatorics greedy math *1300	0 / 0	4
	3446	P1327E Count The Blocks combinatorics dp math *1800	1 / 3	6
	3445	P1327F AND Segments bitmasks combinatorics data structures dp two pointers *2500	0 / 0	9
	3439	P1328B K-th Beautiful String binary search brute force combinatorics implementation math *1300	0 / 0	4
	3427	P1329B Dreamoon Likes Sequences bitmasks combinatorics math *1700	0 / 0	5
	3394	P1332E Height All the Same combinatorics constructive algorithms math matrices *2100	0 / 0	7
	3376	P1334E Divisor Paths combinatorics graphs greedy math number theory *2200	0 / 0	8
	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
	3333	P1342E Placing Rooks combinatorics fft math *2300	0 / 0	8
	3225	P1359E Modular Stability combinatorics math number theory *2000	0 / 0	7
	3189	P1365G Secure Password bitmasks combinatorics constructive algorithms interactive math *2800	0 / 0	10
	3184	P1366E Two Arrays binary search brute force combinatorics constructive algorithms dp two pointers *2100	0 / 0	7
	3148	P1371E1 Asterism (Easy Version) binary search brute force combinatorics math number theory sortings *1900	0 / 0	6
	3147	P1371E2 Asterism (Hard Version) binary search combinatorics dp math number theory sortings *2300	0 / 0	8
	3090	P1383E Strange Operation combinatorics data structures dp *2800	0 / 0	10
	3057	P1391C Cyclic Permutations combinatorics dp graphs math *1500	0 / 0	5
	3047	P1392H ZS Shuffles Cards combinatorics dp math probabilities *3000	0 / 0	10
	3007	P1400D Zigzags brute force combinatorics data structures math two pointers *1900	0 / 0	6
	3004	P1400G Mercenaries bitmasks brute force combinatorics dp dsu math two pointers *2600	0 / 0	10
	2995	P1402C Star Trek special problem combinatorics dfs and similar dp games graphs matrices trees 2600	0 / 0	10
	2992	P1403C Chess Rush special problem combinatorics dp implementation math 3200	0 / 0	10
	2968	P1408G Clusterization Counting combinatorics dp dsu fft graphs trees *2700	0 / 0	10
	2928	P1418E Expected Damage binary search combinatorics probabilities *2400	0 / 0	9
	2914	P1420D Rescue Nibel! combinatorics data structures sortings *1800	0 / 0	6
	2905	P1422C Bargain combinatorics dp math *1700	0 / 0	5
	2882	P1425D Danger of Mad Snakes combinatorics dp math *2300	0 / 0	8
	2872	P1426F Number of Subsequences combinatorics dp strings *2000	0 / 0	7
	2833	P1433E Two Round Dances combinatorics math *1300	0 / 0	4
	2827	P1436C Binary Search binary search combinatorics *1500	0 / 0	5
	2824	P1436F Sum Over Subsets combinatorics math number theory *2800	0 / 0	10
	2818	P1437F Emotional Fishermen combinatorics dp math two pointers *2600	0 / 0	10
	2806	P1439D INOI Final Contests combinatorics dp fft *3100	0 / 0	10
	2801	P1442B Identify the Operations combinatorics data structures dsu greedy implementation *1800	0 / 0	6
	2791	P1444B Divide and Sum combinatorics math sortings *1900	0 / 0	6
	2768	P1450H1 Multithreading (Easy Version) combinatorics fft math *2900	0 / 0	10
	2767	P1450H2 Multithreading (Hard Version) combinatorics implementation math *3300	0 / 0	10
	2756	P1452D Radio Towers combinatorics dp math *1600	0 / 0	5
	2742	P1454E Number of Simple Paths combinatorics dfs and similar graphs trees *2000	0 / 0	7
	2705	P1462E1 Close Tuples (easy version) binary search combinatorics math sortings two pointers *1500	0 / 0	5
	2704	P1462E2 Close Tuples (hard version) binary search combinatorics implementation math sortings two pointers *1700	0 / 0	5
	2679	P1466G Song of the Sirens combinatorics divide and conquer hashing math string suffix structures strings *2600	0 / 0	10
	2676	P1466H Finding satisfactory solutions combinatorics dp graphs greedy math *3300	0 / 0	10
	2668	P1467D Sum of Paths combinatorics dp math *2200	0 / 0	8
	2619	P1470E Strange Permutation binary search combinatorics data structures dp graphs implementation two pointers *3200	0 / 0	10
	2595	P1473G Tiles combinatorics dp fft math *2800	0 / 0	10
	2582	P1475C Ball in Berland combinatorics graphs math *1400	0 / 0	4
	2578	P1475E Advertising Agency combinatorics math sortings *1600	0 / 0	5
	2551	P1477F Nezzar and Chocolate Bars combinatorics fft math probabilities *3500	0 / 0	10
	2503	P1485F Copy or Prefix Sum combinatorics data structures dp sortings *2400	0 / 0	9
	2496	P1486F Pairs of Paths combinatorics data structures dfs and similar dp trees *2600	0 / 0	10
	2489	P1487G String Counting combinatorics dp fft math *2700	0 / 0	10
	2478	P1488H Build From Suffixes special problem combinatorics data structures 2800	0 / 0	10
	2413	P1495D BFS Trees combinatorics dfs and similar graphs math shortest paths trees *2600	0 / 0	10
	2383	P1499A Domino on Windowsill combinatorics constructive algorithms math *800	0 / 0	3
	2379	P1499E Chaotic Merge combinatorics dp math strings *2400	0 / 0	9
	2376	P1499F Diameter Cuts combinatorics dfs and similar dp trees *2400	0 / 0	9
	2352	P1503E 2-Coloring combinatorics dp math *3100	0 / 0	10
	2325	P1508B Almost Sorted binary search combinatorics constructive algorithms implementation *1800	0 / 0	6
	2291	P1511E Colorings and Dominoes combinatorics dp greedy math *2100	0 / 0	7
	2273	P1513B AND Sequences bitmasks combinatorics constructive algorithms math *1400	0 / 0	4
	2270	P1513E Cost Equilibrium combinatorics constructive algorithms math sortings *2300	0 / 0	8
	2267	P1514B AND 0, Sum Big bitmasks combinatorics math *1200	0 / 0	4
	2259	P1515E Phoenix and Computers combinatorics dp math *2200	0 / 0	8
	2242	P1516E Baby Ehab Plays with Permutations combinatorics dp math *2500	0 / 0	9
	2231	P1517F Reunion combinatorics dp trees *3200	0 / 0	10
	2202	P1523E Crypto Lights combinatorics dp math probabilities *2600	0 / 0	10
	2190	P1525E Assimilation IV combinatorics dp math probabilities two pointers *2100	0 / 0	7
	2178	P1526E Oolimry and Suffix Array combinatorics constructive algorithms math *2400	0 / 0	9
	2171	P1527D MEX Tree combinatorics dfs and similar implementation math trees *2400	0 / 0	9
	2165	P1528B Kavi on Pairing Duty combinatorics dp math *1700	0 / 0	5
	2161	P1528E Mashtali and Hagh Trees combinatorics dp trees *2900	0 / 0	10
	2160	P1528F AmShZ Farm combinatorics fft math *3300	0 / 0	10
	2148	P1530F Bingo bitmasks combinatorics dp math probabilities *2600	0 / 0	10
	2124	P1534C Little Alawn's Puzzle combinatorics dp dsu graphs math *1300	0 / 0	4
	2097	P1536E Omkar and Forest combinatorics graphs math shortest paths *2300	0 / 0	8
	2096	P1536F Omkar and Akmar chinese remainder theorem combinatorics constructive algorithms fft games geometry math meet-in-the-middle string suffix structures *2600	0 / 0	10
	2077	P1539A Contest Start combinatorics geometry greedy math *1000	0 / 0	3
	2070	P1540B Tree Array brute force combinatorics dp graphs math probabilities trees *2300	0 / 0	8
	2059	P1542D Priority Queue combinatorics dp implementation math ternary search *2200	0 / 0	8
	2058	P1542E1 Abnormal Permutation Pairs (easy version) combinatorics dp fft math *2400	0 / 0	9

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