Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
33:00:09
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
33:00:09
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
53D	Physical Education sortings	1500	x1901
1811G1	Vlad and the Nice Paths (easy version) combinatorics, dp, math	2100	x1900
1102F	Elongated Matrix binary search, bitmasks, brute force, dp, graphs	2000	x1899
1089F	Fractions math	1900	x1897
1380E	Merging Towers data structures, dsu, implementation, trees	2300	x1896
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x1896
44B	Cola implementation	1500	x1896
1769A	Узкая дорога *special problem, math	800	x1893
954G	Castle Defense binary search, data structures, greedy, two pointers	2000	x1893
120D	Three Sons brute force	1400	x1892
1019B	The hat binary search, interactive	2000	x1891
41E	3-cycles constructive algorithms, graphs, greedy	1900	x1891
761E	Dasha and Puzzle constructive algorithms, dfs and similar, graphs, greedy, trees	2000	x1890
883I	Photo Processing binary search, dp	1900	x1889
356B	Xenia and Hamming implementation, math	1900	x1885
1140E	Palindrome-less Arrays combinatorics, divide and conquer, dp	2200	x1884
1607F	Robot on the Board 2 brute force, dfs and similar, graphs, implementation	2300	x1882
723E	One-Way Reform constructive algorithms, dfs and similar, flows, graphs, greedy	2200	x1882
145C	Lucky Subsequence combinatorics, dp, math	2100	x1881
883E	Field of Wonders implementation, strings	1500	x1876
1408E	Avoid Rainbow Cycles data structures, dsu, graphs, greedy, sortings, trees	2400	x1874
250C	Movie Critics greedy	1600	x1874
933B	A Determined Cleanup math	2000	x1873
81B	Sequence Formatting implementation, strings	1700	x1873
1841E	Fill the Matrix data structures, greedy, math	2200	x1871
818E	Card Game Again binary search, data structures, number theory, two pointers	1900	x1871
1120C	Compress String dp, strings	2100	x1869
884D	Boxes And Balls data structures, greedy	2300	x1869
784E	Twisted Circuit *special problem, brute force, implementation	2000	x1869
1292C	Xenon's Attack on the Gangs combinatorics, dfs and similar, dp, greedy, trees	2300	x1867
975D	Ghosts geometry, math	2000	x1867
1485F	Copy or Prefix Sum combinatorics, data structures, dp, sortings	2400	x1862
1239D	Catowice City 2-sat, dfs and similar, graph matchings, graphs	2400	x1862
1149B	Three Religions dp, implementation, strings	2200	x1858
1027E	Inverse Coloring combinatorics, dp, math	2100	x1858
1469E	A Bit Similar bitmasks, brute force, hashing, string suffix structures, strings, two pointers	2400	x1849
30C	Shooting Gallery dp, probabilities	1800	x1847
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x1846
1209E2	Rotate Columns (hard version) bitmasks, dp, greedy, sortings	2500	x1845
1083B	The Fair Nut and Strings greedy, strings	2000	x1845
333D	Characteristics of Rectangles binary search, bitmasks, brute force, implementation, sortings	2100	x1844
1815C	Between constructive algorithms, dfs and similar, graphs, greedy	2200	x1842
1055C	Lucky Days math, number theory	1900	x1840
765F	Souvenirs data structures	3100	x1840
1912A	Accumulator Apex data structures, implementation, sortings	1900	x1839
1615D	X(or)-mas Tree bitmasks, dfs and similar, dsu, graphs, trees	2200	x1836
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1836
798D	Mike and distribution constructive algorithms, sortings	2400	x1836
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x1835
49D	Game brute force, dp, implementation	1800	x1830
1622E	Math Test bitmasks, brute force, greedy	2200	x1829
926C	Is This a Zebra? implementation	1700	x1827
1938H	Pho Restaurant	1600	x1826
1416D	Graph and Queries data structures, dsu, graphs, implementation, trees	2600	x1826
676D	Theseus and labyrinth graphs, implementation, shortest paths	2000	x1825
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1821
1093G	Multidimensional Queries bitmasks, data structures	2300	x1820
919E	Congruence Equation chinese remainder theorem, math, number theory	2100	x1819
399B	Red and Blue Balls		x1817
1132D	Stressful Training binary search, greedy	2300	x1814
342C	Cupboard and Balloons geometry	1900	x1814
848B	Rooter's Song constructive algorithms, data structures, geometry, implementation, sortings, two pointers	1900	x1813
748D	Santa Claus and a Palindrome constructive algorithms, data structures, greedy	2100	x1810
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1808
960E	Alternating Tree combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees	2300	x1807
603C	Lieges of Legendre games, math	2200	x1807
131E	Yet Another Task with Queens sortings	1700	x1807
6D	Lizards and Basements 2 brute force, dp	2600	x1807
1737D	Ela and the Wiring Wizard brute force, dp, graphs, greedy, implementation, shortest paths	2200	x1806
689E	Mike and Geometry Problem combinatorics, data structures, dp, geometry, implementation	2000	x1806
1721E	Prefix Function Queries dfs and similar, dp, hashing, string suffix structures, strings, trees	2200	x1805
242D	Dispute dfs and similar, graphs, greedy	2100	x1805
575D	Tablecity constructive algorithms, implementation	1700	x1803
527E	Data Center Drama dfs and similar, graphs	2600	x1802
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1801
570E	Pig and Palindromes combinatorics, dp	2300	x1801
1325E	Ehab's REAL Number Theory Problem brute force, dfs and similar, graphs, number theory, shortest paths	2600	x1800
1185F	Two Pizzas bitmasks, brute force	2100	x1800
78C	Beaver Game dp, games, number theory	2000	x1798
963D	Frequency of String hashing, string suffix structures, strings	2500	x1797
954E	Water Taps binary search, greedy, sortings	2000	x1797
216C	Hiring Staff greedy	1800	x1797
727D	T-shirts Distribution constructive algorithms, flows, greedy	1800	x1796
412D	Giving Awards dfs and similar	2000	x1796
980E	The Number Games data structures, greedy, trees	2200	x1795
51C	Three Base Stations binary search, greedy	1800	x1794
1510D	Digits dp, math, number theory	2100	x1792
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1791
1638E	Colorful Operations brute force, data structures, implementation	2400	x1787
1394B	Boboniu Walks on Graph brute force, dfs and similar, graphs, hashing	2300	x1785
1225E	Rock Is Push binary search, dp	2200	x1785
1832D2	Red-Blue Operations (Hard Version) binary search, constructive algorithms, greedy, implementation, math	2400	x1784
549H	Degenerate Matrix binary search, math	2100	x1784
24D	Broken robot dp, math, probabilities	2400	x1784
1190C	Tokitsukaze and Duel brute force, games, greedy	2300	x1783
1057B	DDoS *special problem, brute force	1400	x1782
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1782
290D	Orange *special problem, implementation	1400	x1782
65A	Harry Potter and Three Spells implementation, math	1800	x1781
1252K	Addition Robot data structures, math, matrices	2100	x1780