Enter
|
Register
Home
Top
Catalog
Contests
Gym
Problemset
Groups
Rating
Edu
API
Calendar
Help
→ Pay attention
Before contest
Educational Codeforces Round 165 (Rated for Div. 2)
45:03:32
Register now »
→ Filter Problems
Difficulty:
—
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
Add tag
Main
acmsguru
|
Problems
Submit
Status
Standings
Custom test
Problems
#
Name
4A
Watermelon
brute force
,
math
800
x479615
71A
Way Too Long Words
strings
800
x352211
231A
Team
brute force
,
greedy
800
x298048
1A
Theatre Square
math
1000
x245057
282A
Bit++
implementation
800
x235033
158A
Next Round
*special problem
,
implementation
800
x231690
50A
Domino piling
greedy
,
math
800
x227923
263A
Beautiful Matrix
implementation
800
x223771
112A
Petya and Strings
implementation
,
strings
800
x208377
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197477
281A
Word Capitalization
implementation
,
strings
800
x195347
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192409
118A
String Task
implementation
,
strings
1000
x180698
791A
Bear and Big Brother
implementation
800
x178057
266A
Stones on the Table
implementation
800
x177378
617A
Elephant
math
800
x169403
546A
Soldier and Bananas
brute force
,
implementation
,
math
800
x166922
59A
Word
implementation
,
strings
800
x161300
69A
Young Physicist
implementation
,
math
1000
x154532
977A
Wrong Subtraction
implementation
800
x154243
96A
Football
implementation
,
strings
900
x148566
110A
Nearly Lucky Number
implementation
800
x141946
734A
Anton and Danik
implementation
,
strings
800
x139478
41A
Translation
implementation
,
strings
800
x134365
116A
Tram
implementation
800
x131587
677A
Vanya and Fence
implementation
800
x130037
271A
Beautiful Year
brute force
800
x127034
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x126318
58A
Chat room
greedy
,
strings
1000
x121820
1030A
In Search of an Easy Problem
implementation
800
x119375
122A
Lucky Division
brute force
,
number theory
1000
x115624
467A
George and Accommodation
implementation
800
x113318
344A
Magnets
implementation
800
x111279
160A
Twins
greedy
,
sortings
900
x110485
486A
Calculating Function
implementation
,
math
800
x108937
136A
Presents
implementation
800
x108715
200B
Drinks
implementation
,
math
800
x107343
318A
Even Odds
math
900
x105794
61A
Ultra-Fast Mathematician
implementation
800
x103263
228A
Is your horseshoe on the other hoof?
implementation
800
x101546
133A
HQ9+
implementation
900
x99675
705A
Hulk
implementation
800
x99091
405A
Gravity Flip
greedy
,
implementation
,
sortings
900
x94054
1328A
Divisibility Problem
math
800
x92922
469A
I Wanna Be the Guy
greedy
,
implementation
800
x91017
520A
Pangram
implementation
,
strings
800
x89404
144A
Arrival of the General
implementation
800
x88677
479A
Expression
brute force
,
math
1000
x88340
148A
Insomnia cure
constructive algorithms
,
implementation
,
math
800
x86847
996A
Hit the Lottery
dp
,
greedy
800
x83897
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x83700
443A
Anton and Letters
constructive algorithms
,
implementation
800
x83597
208A
Dubstep
strings
900
x83260
158B
Taxi
*special problem
,
greedy
,
implementation
1100
x82226
785A
Anton and Polyhedrons
implementation
,
strings
800
x81869
131A
cAPS lOCK
implementation
,
strings
1000
x80994
25A
IQ test
brute force
1300
x80846
268A
Games
brute force
800
x80641
1335A
Candies and Two Sisters
math
800
x78372
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77638
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76771
510A
Fox And Snake
implementation
800
x76650
337A
Puzzles
greedy
900
x75337
230A
Dragons
greedy
,
sortings
1000
x74072
427A
Police Recruits
implementation
800
x72181
1352A
Sum of Round Numbers
implementation
,
math
800
x71518
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x70916
750A
New Year and Hurry
binary search
,
brute force
,
implementation
,
math
800
x70557
723A
The New Year: Meeting Friends
implementation
,
math
,
sortings
800
x70441
155A
I_love_\%username\%
brute force
800
x70390
230B
T-primes
binary search
,
implementation
,
math
,
number theory
1300
x69623
732A
Buy a Shovel
brute force
,
constructive algorithms
,
implementation
,
math
800
x67001
581A
Vasya the Hipster
implementation
,
math
800
x66904
339B
Xenia and Ringroad
implementation
1000
x66226
1154A
Restoring Three Numbers
math
800
x66160
151A
Soft Drinking
implementation
,
math
800
x65475
1742A
Sum
implementation
800
x64177
1399A
Remove Smallest
greedy
,
sortings
800
x62507
451A
Game With Sticks
implementation
900
x62458
1409A
Yet Another Two Integers Problem
greedy
,
math
800
x62298
189A
Cut Ribbon
brute force
,
dp
1300
x62259
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62202
630A
Again Twenty Five!
number theory
800
x61660
381A
Sereja and Dima
greedy
,
implementation
,
two pointers
800
x59998
1512A
Spy Detected!
brute force
,
implementation
800
x59691
466A
Cheap Travel
implementation
1200
x59353
1692A
Marathon
implementation
800
x59352
32B
Borze
expression parsing
,
implementation
800
x58447
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x58101
1676A
Lucky?
implementation
800
x57668
758A
Holiday Of Equality
implementation
,
math
800
x57054
472A
Design Tutorial: Learn from Math
math
,
number theory
800
x56846
1669A
Division?
implementation
800
x56735
432A
Choosing Teams
greedy
,
implementation
,
sortings
800
x56494
579A
Raising Bacteria
bitmasks
1000
x55867
1560A
Dislike of Threes
implementation
800
x55670
1807A
Plus or Minus
implementation
800
x55317
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x55295
1475A
Odd Divisor
math
,
number theory
900
x54869
1367A
Short Substrings
implementation
,
strings
800
x54684
←
1
2
3
...
94
95
→
User lists
Name