Problemset - Codeforces

→ Pay attention

Before contest
WorldQuant Round 1 (Codeforces Round 1128, Div. 1 + Div. 2)
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1527C	Sequence Pair Weight hashing, implementation, math	1600	x15406
1527B2	Palindrome Game (hard version) constructive algorithms, games	1900	x8931
1527B1	Palindrome Game (easy version) constructive algorithms, games	1200	x37161
1527A	And Then There Were K bitmasks	800	x43425
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x415
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1609
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2882
1526C2	Potions (Hard Version) data structures, greedy	1600	x33204
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x28686
1526B	I Hate 1111 dp, math, number theory	1400	x38379
1526A	Mean Inequality constructive algorithms, sortings	800	x25171
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x518
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2601
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x11199
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x5155
1525B	Permutation Sort constructive algorithms, greedy	900	x26922
1525A	Potion-making math, number theory	800	x27269
1523H	Hopping Around the Array data structures, dp	3500	x468
1523G	Try Booking data structures, divide and conquer	3200	x603
1523F	Favorite Game bitmasks, dp	3300	x556
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x2058
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2578
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x9240
1523B	Lord of the Values constructive algorithms	1100	x12578
1523A	Game of Life implementation	800	x14115
1521E	Nastia and a Beautiful Matrix binary search, constructive algorithms, dp, greedy	2700	x772
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x2459
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4703
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x23330
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x42921
1520G	To Go Or Not To Go? brute force, dfs and similar, graphs, greedy, implementation, shortest paths	2200	x4445
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x3466
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x15286
1520E	Arranging The Sheep greedy, math	1400	x30982
1520D	Same Differences data structures, hashing, math	1200	x71051
1520C	Not Adjacent Matrix constructive algorithms	1000	x35225
1520B	Ordinary Numbers brute force, math, number theory	800	x50965
1520A	Do Not Be Distracted! brute force, implementation	800	x60042
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x894
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x990
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x18156
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x24187
1519B	The Cake Is a Lie dp, math	800	x33838
1519A	Red and Blue Beans math	800	x30925
1517H	Fly Around the World dp, geometry	3500	x99
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x776
1517F	Reunion combinatorics, dp, trees	3200	x736
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x1072
1517D	Explorer Space dp, graphs, shortest paths	1800	x9647
1517C	Fillomino 2 constructive algorithms, dfs and similar, greedy, implementation	1400	x14319
1517B	Morning Jogging constructive algorithms, greedy, sortings	1200	x13936
1517A	Sum of 2050 greedy, math	800	x27117
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x1117
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x5476
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x14741
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x27539
1516A	Tit for Tat greedy	800	x24928
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x450
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x373
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x1447
1515F	Phoenix and Earthquake constructive algorithms, dfs and similar, dsu, graphs, greedy, trees	2600	x2278
1515E	Phoenix and Computers combinatorics, dp, math	2200	x4824
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x13039
1515C	Phoenix and Towers constructive algorithms, data structures, greedy	1400	x19209
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x27426
1515A	Phoenix and Gold constructive algorithms, greedy, math	800	x21602
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x724
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x5134
1514C	Product 1 Modulo N greedy, number theory	1600	x19264
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x37919
1514A	Perfectly Imperfect Array math, number theory	800	x25564
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1500
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1795
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x6939
1513C	Add One dp, matrices	1600	x17194
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x21660
1513A	Array and Peaks constructive algorithms, implementation	800	x20116
1512G	Short Task brute force, dp, math, number theory	1700	x9809
1512F	Education brute force, dp, greedy, implementation	1900	x6953
1512E	Permutation by Sum brute force, greedy, math	1600	x11598
1512D	Corrupted Array constructive algorithms, data structures, greedy	1200	x25158
1512C	A-B Palindrome constructive algorithms, implementation, strings	1200	x22254
1512B	Almost Rectangle implementation	800	x26831
1512A	Spy Detected! brute force, implementation	800	x84716
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x998
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x666
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2976
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x12659
1511C	Yet Another Card Deck brute force, data structures, implementation, trees	1100	x35613
1511B	GCD Length constructive algorithms, math, number theory	1100	x25087
1511A	Review Site greedy	800	x29074
1510K	King's Task brute force, graphs, implementation	1200	x6101
1510J	Japanese Game constructive algorithms, math	2700	x569
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x607
1510H	Hard Optimization dp	3200	x141
1510G	Guide	2100	x1394
1510F	Fiber Shape	2800	x65
1510E	Equilibrium Point /\textbackslash/\textbackslash	2700	x272
1510D	Digits dp, math, number theory	2100	x2160
1510C	Cactus Not Enough dfs and similar, graph matchings, graphs	2900	x256

The only programming contests Web 2.0 platform

Server time: Oct/15/2026 06:41:24 (g2).

Desktop version, switch to mobile version.

Supported by