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# Problem Tags Rating Solved
1282-B2 K for the Price of One (Hard Version)
dp greedy sortings
1600
1282-B1 K for the Price of One (Easy Version)
dp greedy sortings
1400
1282-A Temporarily unavailable
implementation math
900
1281-B Azamon Web Services
greedy
1600
1281-A Suffix Three
implementation
800
1280-F Intergalactic Sliding Puzzle
combinatorics constructive algorithms math
3400
1280-E Kirchhoff's Current Loss
math
2900
1280-D Miss Punyverse
dp greedy trees
2500
1280-C Jeremy Bearimy
dfs and similar graphs greedy +1
2000
1280-B Beingawesomeism
implementation math
1800
1280-A Cut and Paste
implementation math
1700
1279-F New Year and Handle Change
binary search dp
2800
1279-E New Year Permutations
combinatorics dp
2700
1279-D Santa's Bot
combinatorics math probabilities
1700
1279-C Stack of Presents
data structures implementation
1400
1279-B Verse For Santa
binary search brute force implementation
1300
1279-A New Year Garland
math
900
1278-F Cards
combinatorics dp math +2
2600
1278-E Tests for problem D
constructive algorithms dfs and similar divide and conquer +1
2200
1278-D Segment Tree
data structures dsu graphs +1
2100
1278-C Berry Jam
data structures dp greedy +1
1700
1278-B A and B
greedy math
1500
1278-A Shuffle Hashing
brute force implementation strings
1000
1277-D Let's Play the Words?
data structures hashing implementation +1
1900
1277-B Make Them Odd
greedy number theory
1200
1277-A Happy Birthday, Polycarp!
implementation
1000
1276-F Asterisk Substrings
string suffix structures
3400
1276-E Four Stones
constructive algorithms
3500
1276-D Tree Elimination
dp trees
2900
1276-C Beautiful Rectangle
brute force combinatorics constructive algorithms +3
2300
1276-B Two Fairs
combinatorics dfs and similar dsu +1
1900
1276-A As Simple as One and Two
dp greedy
1400
1275-F Шардирование постов
*special binary search interactive
1275-E3 Контрольная сумма
*special
1275-E2 Контрольная сумма
*special
1275-E1 Контрольная сумма
*special
1275-D Storage2
*special
1275-C #define Задача B ...
*special
1275-B Code Review
*special
1275-A Скрытый друг
*special
1272-F Two Bracket Sequences
dp strings two pointers
2200
1272-E Nearest Opposite Parity
dfs and similar graphs shortest paths
1900
1272-D Remove One Element
brute force dp
1500
1272-C Yet Another Broken Keyboard
combinatorics dp implementation
1200
1272-B Snow Walking Robot
constructive algorithms greedy implementation
1200
1272-A Three Friends
brute force greedy math +1
900
1271-F Divide The Students
brute force
2700
1271-E Common Number
binary search combinatorics dp +1
2100
1271-D Portals
data structures dp greedy +2
2100
1271-C Shawarma Tent
brute force geometry greedy +1
1300