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Problemset

2,107 problems · filtered by 1 tag

#	Name	Rating↕	Solved↕
2181K	Knit the Grid 2-sat constructive algorithms graphs matrices	3500	89
2180C	XOR-factorization bitmasks constructive algorithms dp greedy number theory	1900	6.7k
2179D	Blackslex and Penguin Civilization bitmasks constructive algorithms greedy math	1300	14.1k
2179E	Blackslex and Girls constructive algorithms geometry math	1800	6k
2179F	Blackslex and Another RGB Walking communication constructive algorithms graphs interactive number theory trees	2000	2.9k
2178D	Xmas or Hysteria constructive algorithms greedy implementation math	1700	7k
2175B	XOR Array constructive algorithms math	1300	13k
2174E1	Game of Scientists (Version 1) chinese remainder theorem constructive algorithms interactive math	3100	147
2173C	Kanade's Perfect Multiples brute force constructive algorithms greedy number theory	1400	13.2k
2173E	Shiro's Mirror Duel constructive algorithms greedy interactive probabilities sortings	2200	1.6k
2172N	New Kingdom constructive algorithms graphs implementation	2800	176
2171E	Anisphia Wynn Palettia and Good Permutations constructive algorithms greedy number theory	2000	3.8k
2171F	Rae Taylor and Trees (hard version) binary search constructive algorithms data structures dp dsu greedy implementation trees	1600	7.6k
2170D	Almost Roman constructive algorithms greedy implementation	2200	1.8k
2168A1	Encode and Decode (Easy Version) communication constructive algorithms interactive	unrated	5.3k
2168B	Locate binary search combinatorics communication constructive algorithms greedy interactive	unrated	1.6k
2168C	Intercepting Butterflies bitmasks communication constructive algorithms graphs interactive	unrated	912
2167C	Isamatdin and His Magic Wand! constructive algorithms greedy implementation sortings	800	37.1k
2165A	Cyclic Merging constructive algorithms greedy	1300	15.9k
2165E	Rainbow Branch constructive algorithms dp greedy trees	3200	416
2164G	Pointless Machine constructive algorithms graphs interactive trees	3300	249
2163B	Siga ta Kymata constructive algorithms greedy implementation math	1700	9.5k
2162B	Beautiful String brute force constructive algorithms	1000	28.9k
2162C	Beautiful XOR bitmasks constructive algorithms greedy	1100	22.2k
2162E	Beautiful Palindromes constructive algorithms greedy schedules	1600	9.8k
2162F	Beautiful Intervals constructive algorithms greedy	2100	3k
2162G	Beautiful Tree constructive algorithms math probabilities trees	2200	2.9k
2161C	Loyalty constructive algorithms greedy sortings two pointers	1200	13.3k
2159A	MAD Interactive Problem constructive algorithms implementation interactive	1700	9k
2158A	Suspension constructive algorithms greedy math	800	24k
2158B	Split constructive algorithms greedy math	1200	14.7k
2158D	Palindrome Flipping brute force constructive algorithms graphs implementation shortest paths strings	2000	3.4k
2158F1	Distinct GCDs (Easy Version) constructive algorithms graphs math number theory	2600	450
2158F2	Distinct GCDs (Hard Version) combinatorics constructive algorithms graphs math number theory	3000	287
2157C	Meximum Array 2 constructive algorithms greedy implementation math	1400	10.9k
2157F	Git Gud brute force constructive algorithms divide and conquer math ternary search	2400	1.5k
2157G	Isaac's Queries bitmasks brute force constructive algorithms dfs and similar divide and conquer dp greedy interactive math probabilities	2800	672
2157H	Keygen 3 brute force combinatorics constructive algorithms dfs and similar math	3200	238
2156A	Pizza Time brute force constructive algorithms greedy	800	27.5k
2156D	Find the Last Number binary search bitmasks constructive algorithms interactive	1900	5.5k
2155B	Abraham's Great Escape constructive algorithms graphs	1100	17.8k
2155D	Batteries brute force constructive algorithms graph matchings graphs interactive math	1800	6.2k
2154B	Make it Zigzag constructive algorithms greedy	1000	20.5k
2154D	Catshock constructive algorithms dfs and similar graphs trees two pointers	1900	5k
2154F1	Bombing (Easy Version) brute force combinatorics constructive algorithms implementation math	2700	594
2153C	Symmetrical Polygons constructive algorithms geometry greedy implementation sortings	1500	12.3k
2152E	Monotone Subsequence constructive algorithms graphs greedy interactive math	2100	3.9k
2150F	Cycle Closing constructive algorithms graphs implementation shortest paths trees	3000	224
2148D	Destruction of the Dandelion Fields constructive algorithms greedy sortings	1000	27.9k
2147A	Shortest Increasing Path constructive algorithms greedy	800	20.2k
2147B	Multiple Construction constructive algorithms	1000	18.7k
2147C	Rabbits constructive algorithms dp greedy implementation	1500	11.3k
2147H	Maxflow GCD Coloring constructive algorithms flows graphs	3500	284
2147I1	Longest Increasing Path (Easy Version) constructive algorithms math	3300	143
2147I2	Longest Increasing Path (Hard Version) constructive algorithms math	3500	113
2146C	Wrong Binary Search binary search constructive algorithms	1300	14k
2146D1	Max Sum OR (Easy Version) bitmasks constructive algorithms divide and conquer greedy trees	1500	11.2k
2146D2	Max Sum OR (Hard Version) bitmasks constructive algorithms divide and conquer greedy	2000	4.3k
2146E	Yet Another MEX Problem brute force constructive algorithms data structures divide and conquer greedy hashing	2300	2.2k
2145D	Inversion Value of a Permutation constructive algorithms dfs and similar dp	1800	7k
2144A	Cut the Array brute force constructive algorithms math number theory	800	22.3k
2144B	Maximum Cost Permutation constructive algorithms greedy	1000	19.3k
2144F	Bracket Groups brute force constructive algorithms dp string suffix structures strings	2700	1.1k
2143C	Max Tree constructive algorithms dfs and similar graphs greedy	1300	14.9k
2143E	Make Good constructive algorithms greedy math strings	2400	2.1k
2140B	Another Divisibility Problem constructive algorithms math number theory	900	23.2k
2138A	Cake Assignment bitmasks constructive algorithms greedy	1100	17.7k
2138E1	Determinant Construction (Easy Version) brute force constructive algorithms math matrices number theory	3100	270
2138E2	Determinant Construction (Hard Version) brute force constructive algorithms math matrices number theory	3100	197
2138F	Ode to the Bridge Builder constructive algorithms geometry	3500	93
2137A	Collatz Conjecture constructive algorithms math	800	36.3k
2137B	Fun Permutation constructive algorithms math number theory	900	27.4k
2137D	Replace with Occurrences constructive algorithms	1200	20.4k
2136B	Like the Bitset constructive algorithms greedy two pointers	900	21.7k
2135B	For the Champion constructive algorithms interactive math	1700	8.6k
2135D1	From the Unknown (Easy Version) constructive algorithms interactive math	2100	3.4k
2135D2	From the Unknown (Hard Version) brute force constructive algorithms interactive math	2500	1.2k
2134A	Painting With Two Colors constructive algorithms implementation math	800	27.4k
2134B	Add 0 or K constructive algorithms math number theory	1200	21.9k
2134D	Sliding Tree constructive algorithms dfs and similar greedy implementation trees	2300	3.8k
2134E	Power Boxes constructive algorithms dp implementation interactive	2300	2.5k
2133E	I Yearned For The Mines constructive algorithms dfs and similar dp greedy trees	2500	1.8k
2131B	Alternating Series constructive algorithms greedy math	800	31.5k
2131H	Sea, You & copriMe brute force constructive algorithms graphs greedy math number theory	2600	909
2130B	Pathless constructive algorithms	1100	22.1k
2129A	Double Perspective constructive algorithms dp dsu graphs greedy sortings	1300	18.3k
2129C1	Interactive RBS (Easy Version) binary search bitmasks constructive algorithms interactive	1900	4.5k
2129C2	Interactive RBS (Medium Version) binary search bitmasks constructive algorithms interactive	2000	3.2k
2129C3	Interactive RBS (Hard Version) binary search bitmasks constructive algorithms dp interactive	2300	1.9k
2128B	Deque Process constructive algorithms greedy sortings two pointers	1100	22.1k
2128E2	Submedians (Hard Version) binary search constructive algorithms data structures math two pointers	2600	818
2127A	Mix Mex Max constructive algorithms greedy math	800	21.1k
2127E	Ancient Tree constructive algorithms data structures dfs and similar dsu greedy trees	2100	4.4k
2127G1	Inter Active (Easy Version) binary search constructive algorithms interactive probabilities	3400	119
2127G2	Inter Active (Hard Version) binary search bitmasks constructive algorithms graphs implementation interactive math probabilities	3500	126
2125A	Difficult Contest constructive algorithms implementation sortings strings	800	28.5k
2124C	Subset Multiplication constructive algorithms greedy math number theory	1300	16.3k
2124E	Make it Zero constructive algorithms greedy math	2100	4.9k
2124I	Lexicographic Partition constructive algorithms math trees	3500	360
2123D	Binary String Battle constructive algorithms games greedy	1200	22.5k

showing 101–200 of 2,107