Problemset - Codeforces

→ Pay attention

Before contest
CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
26:11:49
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x366
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x888
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1470
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3953
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12979
1956B	Nene and the Card Game games, greedy	800	x21308
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x21770
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1266
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4581
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x7162
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8699
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15555
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x21385
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x28099
1955A	Yogurt Sale math	800	x43816
1954F	Unique Strings combinatorics, dp, math	3100	x256
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2324
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6241
1954C	Long Multiplication greedy, math, number theory	1200	x19539
1954B	Make It Ugly implementation, math	1200	x18683
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x24280
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x76
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x284
1951G	Clacking Balls combinatorics, math, probabilities	3100	x337
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x769
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3666
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5443
1951C	Ticket Hoarding greedy, math, sortings	1400	x11741
1951B	Battle Cows binary search, data structures, greedy	1200	x14708
1951A	Dual Trigger constructive algorithms, greedy, math	900	x19830
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x4426
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x9235
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x14545
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x23327
1950C	Clock Conversion implementation, math	800	x40192
1950B	Upscaling implementation	800	x38310
1950A	Stair, Peak, or Neither? implementation	800	x53683
1949K	Make Triangle constructive algorithms, math	2800	x331
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x403
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1889
1949H	Division Avoidance greedy, math	3100	x127
1949G	Scooter graphs, greedy	2300	x795
1949F	Dating greedy, sortings, trees	2200	x1009
1949E	Damage per Second brute force, math	2900	x105
1949D	Funny or Scary? constructive algorithms	2600	x415
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1798
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x3351
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x115
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x701
1948F	Rare Coins combinatorics, math, probabilities	2500	x1338
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x3018
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x9527
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x17029
1948B	Array Fix brute force, dp, greedy, implementation	1100	x23084
1948A	Special Characters brute force, constructive algorithms	800	x28646
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x983
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2581
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4770
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x11058
1946B	Maximum Sum dp, greedy, math	1100	x20562
1946A	Median of an Array greedy, implementation, sortings	800	x26141
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x679
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x749
1945F	Kirill and Mushrooms data structures, sortings	1900	x4266
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8264
1945D	Seraphim the Owl dp, greedy	1300	x14576
1945C	Left and Right Houses brute force	1200	x15037
1945B	Fireworks math, number theory	900	x22843
1945A	Setting up Camp greedy, math	800	x27834
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16293
1944A	Destroying Bridges graphs, greedy, math	800	x23885
1943F	Minimum Hamming Distance dp	3500	x112
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x306
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x443
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x810
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1515
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2133
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3893
1943A	MEX Game 1 games, greedy	1300	x18122
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x96
1942G	Bessie and Cards combinatorics, dp, math	2800	x456
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x702
1942E	Farm Game combinatorics, games	2300	x1696
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2824
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6205
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x11042
1942B	Bessie and MEX constructive algorithms, math	1100	x14038
1942A	Farmer John's Challenge constructive algorithms, math	800	x17319
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3586
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x6100
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9799
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x18477
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x33593
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x30042
1941A	Rudolf and the Ticket brute force, math	800	x42683
1938M	Zig-zag	3500	x61
1938L	XOR Operations	2800	x296
1938K	Tree Quiz	2400	x637
1938J	There and Back Again	2100	x1304
1938I	Symmetric Boundary	2800	x77