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Before contest
Codeforces Round 942 (Div. 1)
06:09:29
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Before contest
Codeforces Round 942 (Div. 2)
06:09:30
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→ Filter Problems
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combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
472B
Design Tutorial: Learn from Life
1300
x7377
471B
MUH and Important Things
implementation
,
sortings
1300
x5881
469B
Chat Online
implementation
1300
x12300
462B
Appleman and Card Game
greedy
1300
x13992
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x38402
451B
Sort the Array
implementation
,
sortings
1300
x42940
450B
Jzzhu and Sequences
implementation
,
math
1300
x25291
437A
The Child and Homework
implementation
1300
x8876
429A
Xor-tree
dfs and similar
,
trees
1300
x9980
426B
Sereja and Mirroring
implementation
1300
x3765
416B
Art Union
brute force
,
dp
,
implementation
1300
x8516
413B
Spyke Chatting
implementation
1300
x1669
378B
Semifinals
implementation
,
sortings
1300
x5098
376B
I.O.U.
implementation
1300
x6087
371B
Fox Dividing Cheese
math
,
number theory
1300
x10894
370B
Berland Bingo
implementation
1300
x2468
352B
Jeff and Periods
implementation
,
sortings
1300
x15791
347A
Difference Row
constructive algorithms
,
implementation
,
sortings
1300
x8762
332A
Down the Hatch!
implementation
1300
x3521
330B
Road Construction
constructive algorithms
,
graphs
1300
x16346
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7368
312B
Archer
math
,
probabilities
1300
x11045
311A
The Closest Pair
constructive algorithms
,
implementation
1300
x3994
304B
Calendar
brute force
,
implementation
1300
x2917
303A
Lucky Permutation Triple
constructive algorithms
,
implementation
,
math
1300
x7688
298A
Snow Footprints
greedy
,
implementation
1300
x10458
291B
Command Line Arguments
*special problem
,
implementation
,
strings
1300
x3011
288A
Polo the Penguin and Strings
greedy
1300
x6274
276B
Little Girl and Game
games
,
greedy
1300
x27186
271B
Prime Matrix
binary search
,
brute force
,
math
,
number theory
1300
x12344
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6854
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16559
246B
Increase and Decrease
greedy
,
math
1300
x10909
241A
Old Peykan
greedy
1300
x2202
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2004
236B
Easy Number Challenge
implementation
,
number theory
1300
x13443
234C
Weather
dp
,
implementation
1300
x5324
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69672
227A
Where do I Turn?
geometry
1300
x4035
222B
Cosmic Tables
data structures
,
implementation
1300
x5978
221B
Little Elephant and Numbers
implementation
1300
x4498
220A
Little Elephant and Problem
implementation
,
sortings
1300
x11791
215B
Olympic Medal
greedy
,
math
1300
x5355
203B
Game on Paper
brute force
,
implementation
1300
x2546
195B
After Training
data structures
,
implementation
,
math
1300
x5119
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10114
189B
Counting Rhombi
brute force
,
math
1300
x3868
189A
Cut Ribbon
brute force
,
dp
1300
x62306
188B
A + Reverse B
*special problem
,
implementation
1300
x701
185A
Plant
math
1300
x5684
181B
Number of Triplets
binary search
,
brute force
1300
x2883
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2198
171D
Broken checker
*special problem
,
brute force
1300
x2509
171B
Star
*special problem
,
combinatorics
1300
x3936
161A
Dress'em in Vests!
binary search
,
brute force
,
greedy
,
two pointers
1300
x4673
158D
Ice Sculptures
*special problem
,
brute force
,
number theory
1300
x6170
152B
Steps
binary search
,
implementation
1300
x6319
147A
Punctuation
implementation
,
strings
1300
x3551
146B
Lucky Mask
brute force
,
implementation
1300
x4221
144B
Meeting
implementation
1300
x5022
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7426
132A
Turing Tape
implementation
1300
x2728
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3512
117A
Elevator
implementation
,
math
1300
x1971
99B
Help Chef Gerasim
implementation
,
sortings
1300
x2894
96B
Lucky Numbers (easy)
binary search
,
bitmasks
,
brute force
1300
x14385
94B
Friends
graphs
,
implementation
,
math
1300
x4487
92B
Binary Number
greedy
1300
x4693
85A
Domino
constructive algorithms
,
implementation
1300
x1755
83A
Magical Array
math
1300
x6060
71B
Progress Bar
implementation
,
math
1300
x4355
70A
Cookies
math
1300
x3215
66A
Petya and Java
implementation
,
strings
1300
x6202
64A
Factorial
*special problem
,
implementation
1300
x2686
62A
A Student's Dream
greedy
,
math
1300
x3362
61B
Hard Work
strings
1300
x3779
60A
Where Are My Flakes?
implementation
,
two pointers
1300
x3523
58B
Coins
greedy
1300
x11815
57A
Square Earth?
dfs and similar
,
greedy
,
implementation
1300
x2811
56B
Spoilt Permutation
implementation
1300
x3615
54A
Presents
implementation
1300
x1996
51A
Cheaterius's Problem
implementation
1300
x1775
44C
Holidays
implementation
1300
x3199
43C
Lucky Tickets
greedy
1300
x4138
41C
Email address
expression parsing
,
implementation
1300
x3634
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3839
39H
Multiplication Table
implementation
1300
x2602
39F
Pacifist frogs
implementation
1300
x1483
39B
Company Income Growth
greedy
1300
x2555
36A
Extra-terrestrial Intelligence
implementation
1300
x2892
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4064
27B
Tournament
bitmasks
,
brute force
,
dfs and similar
,
greedy
1300
x5134
25A
IQ test
brute force
1300
x80904
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76861
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