Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 175 (Rated for Div. 2)
41:52:27
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1120A	Diana and Liana greedy, implementation, two pointers	1900	x1666
1119H	Triple fft, math	3200	x602
1119G	Get Ready for the Battle constructive algorithms, implementation	3100	x523
1119F	Niyaz and Small Degrees data structures, dp, trees	3400	x748
1119E	Pavel and Triangles brute force, dp, fft, greedy, ternary search	1900	x5144
1119D	Frets On Fire binary search, sortings	1800	x4915
1119C	Ramesses and Corner Inversion constructive algorithms, greedy, implementation, math	1500	x6916
1119B	Alyona and a Narrow Fridge binary search, flows, greedy, sortings	1300	x11880
1119A	Ilya and a Colorful Walk greedy, implementation	1100	x10940
1118F2	Tree Cutting (Hard Version) combinatorics, dfs and similar, dp, trees	2700	x559
1118F1	Tree Cutting (Easy Version) dfs and similar, trees	1800	x6139
1118E	Yet Another Ball Problem constructive algorithms, implementation	1700	x4257
1118D2	Coffee and Coursework (Hard Version) binary search, greedy	1700	x6424
1118D1	Coffee and Coursework (Easy version) brute force, greedy	1700	x5755
1118C	Palindromic Matrix constructive algorithms, implementation	1700	x5847
1118B	Tanya and Candies implementation	1200	x12452
1118A	Water Buying math	800	x20405
1117G	Recursive Queries data structures	2500	x732
1117F	Crisp String bitmasks, dp	2500	x609
1117E	Decypher the String bitmasks, chinese remainder theorem, constructive algorithms, interactive, math	2200	x1552
1117D	Magic Gems dp, math, matrices	2100	x4472
1117C	Magic Ship binary search	1900	x7537
1117B	Emotes greedy, math, sortings	1000	x14741
1117A	Best Subsegment implementation, math	1100	x11102
1116D6	Hessenberg matrix *special problem		x79
1116D5	Creeper *special problem		x149
1116D4	TIE fighter *special problem		x169
1116D3	X-wing fighter *special problem		x203
1116D2	Pattern of increasing blocks *special problem		x233
1116D1	Block diagonal matrix *special problem		x275
1116C3	``Is the number of ones divisible by 3?'' oracle *special problem		x184
1116C2	``Is the bit string periodic?'' oracle *special problem		x186
1116C1	Alternating bits oracle *special problem		x264
1116B2	Not A, not B or not C? *special problem		x59
1116B1	Distinguish three-qubit states *special problem		x133
1116A2	Generate equal superposition of four basis states *special problem		x180
1116A1	Generate state \|00⟩ + \|01⟩ + \|10⟩ *special problem		x323
1115U3	Block unitary *special problem	1700	x198
1115U2	Chessboard unitary *special problem	1600	x236
1115U1	Anti-diagonal unitary *special problem	1500	x258
1115G3	Palindrome checker oracle *special problem	1600	x233
1115G2	OR oracle *special problem	1600	x313
1115G1	AND oracle *special problem	1100	x393
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x2068
1114E	Arithmetic Progression binary search, interactive, number theory, probabilities	2200	x2932
1114D	Flood Fill dp	1900	x7012
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7481
1114B	Yet Another Array Partitioning Task constructive algorithms, greedy, sortings	1500	x9061
1114A	Got Any Grapes? brute force, greedy, implementation	800	x19022
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x7839
1113A	Sasha and His Trip dp, greedy, math	900	x17552
1111E	Tree data structures, dfs and similar, dp, graphs, trees	2500	x969
1111D	Destroy the Colony combinatorics, dp, math	2600	x989
1111C	Creative Snap binary search, brute force, divide and conquer, math	1700	x6390
1111B	Average Superhero Gang Power brute force, implementation, math	1700	x6333
1111A	Superhero Transformation implementation, strings	1000	x17227
1110H	Modest Substrings dp, strings	3500	x307
1110G	Tree-Tac-Toe constructive algorithms, games, trees	3100	x641
1110F	Nearest Leaf data structures, trees	2600	x1812
1110E	Magic Stones constructive algorithms, math, sortings	2200	x4269
1110D	Jongmah dp	2200	x3664
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x9549
1110B	Tape greedy, sortings	1400	x12387
1110A	Parity math	900	x15262
1109F	Sasha and Algorithm of Silence's Sounds data structures, trees	3200	x313
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x560
1109D	Sasha and Interesting Fact from Graph Theory brute force, combinatorics, dp, math, trees	2400	x1372
1109C	Sasha and a Patient Friend binary search, data structures, implementation	2800	x266
1109B	Sasha and One More Name constructive algorithms, hashing, strings	1800	x4408
1109A	Sasha and a Bit of Relax dp, implementation	1600	x8609
1108F	MST Unification binary search, dsu, graphs, greedy	2100	x3044
1108E2	Array and Segments (Hard version) data structures, implementation	2100	x2259
1108E1	Array and Segments (Easy version) brute force, greedy, implementation	1800	x4617
1108D	Diverse Garland constructive algorithms, dp, greedy	1400	x15531
1108C	Nice Garland brute force, greedy, math	1300	x12130
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x23737
1108A	Two distinct points implementation	800	x22199
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x1087
1107F	Vasya and Endless Credits dp, flows, graph matchings, graphs, sortings	2600	x825
1107E	Vasya and Binary String dp	2400	x2392
1107D	Compression dp, implementation, math, number theory	1800	x3760
1107C	Brutality greedy, sortings, two pointers	1300	x10086
1107B	Digital root math, number theory	1000	x16371
1107A	Digits Sequence Dividing greedy, strings	900	x12169
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x1007
1106E	Lunar New Year and Red Envelopes data structures, dp	2100	x2634
1106D	Lunar New Year and a Wander data structures, dfs and similar, graphs, greedy, shortest paths	1500	x15525
1106C	Lunar New Year and Number Division greedy, implementation, math, sortings	900	x14920
1106B	Lunar New Year and Food Ordering data structures, implementation	1500	x6823
1106A	Lunar New Year and Cross Counting implementation	800	x12478
1105E	Helping Hiasat bitmasks, brute force, dp, meet-in-the-middle	2200	x1693
1105D	Kilani and the Game dfs and similar, graphs, implementation, shortest paths	1900	x4211
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10580
1105B	Zuhair and Strings brute force, implementation, strings	1100	x9980
1105A	Salem and Sticks brute force, implementation	1100	x11094
1104B	Game with string data structures, implementation, math	1200	x15421
1104A	Splitting into digits constructive algorithms, implementation, math	800	x15541
1103E	Radix sum fft, math, number theory	3400	x243
1103D	Professional layer bitmasks, dp	3100	x428
1103C	Johnny Solving constructive algorithms, dfs and similar, graphs, math	2700	x883