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# Problem Tags Rating Solved
1421-E Swedish Heroes
brute force dp implementation
2700
1421-D Hexagons
brute force constructive algorithms greedy +3
1900
1421-C Palindromifier
constructive algorithms strings
1400
1421-B Putting Bricks in the Wall
constructive algorithms implementation
1100
1421-A XORwice
bitmasks greedy math
800
1420-E Battle Lemmings
dp greedy
2500
1420-D Rescue Nibel!
combinatorics data structures sortings
1800
1420-C2 Pokémon Army (hard version)
data structures divide and conquer dp +2
2100
1420-C1 Pokémon Army (easy version)
constructive algorithms dp greedy
1300
1420-B Rock and Lever
bitmasks math
1200
1420-A Cubes Sorting
math sortings
900
1419-F Rain of Fire
binary search data structures dfs and similar +3
2800
1419-E Decryption
constructive algorithms implementation math +1
2100
1419-D2 Sage's Birthday (hard version)
binary search brute force constructive algorithms +3
1500
1419-D1 Sage's Birthday (easy version)
binary search constructive algorithms greedy +1
1000
1419-C Killjoy
greedy implementation math
1500
1419-B Stairs
brute force constructive algorithms greedy +2
1200
1419-A Digit Game
games greedy implementation
900
1418-G Three Occurrences
data structures divide and conquer hashing +1
2500
1418-F Equal Product
data structures math number theory +1
3000
1418-E Expected Damage
binary search combinatorics probabilities
2400
1418-D Trash Problem
data structures implementation
2100
1418-C Mortal Kombat Tower
dp graphs greedy +1
1500
1418-B Negative Prefixes
greedy sortings
1300
1418-A Buying Torches
math
1000
1417-B Two Arrays
greedy math sortings
1100
1417-A Copy-paste
greedy math
800
1416-F Showing Off
flows graph matchings greedy +1
3300
1416-E Split
binary search data structures dp +1
3200
1416-D Graph and Queries
data structures dsu graphs +2
2600
1416-C XOR Inverse
bitmasks data structures divide and conquer +6
2000
1416-B Make Them Equal
constructive algorithms greedy math
2000
1416-A k-Amazing Numbers
binary search data structures implementation +1
1500
1415-F Cakes for Clones
dp
2900
1415-E New Game Plus!
constructive algorithms greedy math
2200
1415-D XOR-gun
bitmasks brute force constructive algorithms
2000
1415-C Bouncing Ball
brute force dp implementation
1400
1415-B Repainting Street
brute force greedy
1100
1415-A Prison Break
brute force math
800
1413-F Roads and Ramen
data structures trees
2800
1413-E Solo mid Oracle
greedy math ternary search
2100
1413-D Shurikens
data structures greedy implementation
1700
1413-C Perform Easily
binary search brute force dp +3
1900
1413-B A New Technique
implementation
1100
1413-A Finding Sasuke
constructive algorithms math
800
1411-G No Game No Life
bitmasks games math +1
2700
1411-F The Thorny Path
greedy math
3000
1411-E Poman Numbers
bitmasks greedy math +1
2300
1411-D Grime Zoo
brute force greedy implementation +1
2100
1411-C Peaceful Rooks
dfs and similar dsu graphs
1700