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# Problem Tags Rating Solved
1639-A Treasure Hunt
graphs interactive
1638-F Two Posters
brute force data structures greedy +1
3200
1638-E Colorful Operations
brute force data structures implementation
2400
1638-D Big Brush
constructive algorithms data structures greedy +1
2000
1638-C Inversion Graph
data structures dsu graphs +1
1300
1638-B Odd Swap Sort
data structures math sortings
1100
1638-A Reverse
constructive algorithms greedy math
800
1637-H Minimize Inversions Number
data structures greedy math +1
3500
1637-G Birthday
constructive algorithms greedy math
3000
1637-F Towers
constructive algorithms dfs and similar dp +2
2500
1637-E Best Pair
binary search brute force implementation
2100
1637-D Yet Another Minimization Problem
dp greedy math
1800
1637-C Andrew and Stones
greedy implementation
1200
1637-B MEX and Array
brute force dp greedy +1
1100
1637-A Sorting Parts
brute force sortings
800
1635-F Closest Pair
data structures greedy
2800
1635-E Cars
2-sat constructive algorithms dfs and similar +4
2200
1635-D Infinite Set
bitmasks dp math +3
1800
1635-C Differential Sorting
constructive algorithms greedy
1200
1635-B Avoid Local Maximums
greedy
800
1635-A Min Or Sum
bitmasks greedy
800
1634-F Fibonacci Additions
brute force data structures hashing +2
2700
1634-E Fair Share
constructive algorithms data structures dfs and similar +2
2400
1634-D Finding Zero
constructive algorithms interactive math
2000
1634-C OKEA
constructive algorithms
1000
1634-B Fortune Telling
bitmasks math
1400
1634-A Reverse and Concatenate
greedy strings
800
1633-F Perfect Matching
data structures divide and conquer interactive +1
2800
1633-E Spanning Tree Queries
binary search data structures dfs and similar +6
2400
1633-D Make Them Equal
dp greedy
1600
1633-C Kill the Monster
brute force math
1100
1633-B Minority
greedy
800
1633-A Div. 7
brute force
800
1632-E2 Distance Tree (hard version)
binary search dfs and similar shortest paths +1
2700
1632-E1 Distance Tree (easy version)
binary search data structures dfs and similar +3
2400
1632-D New Year Concert
binary search data structures greedy +3
2000
1632-C Strange Test
binary search bitmasks brute force +2
1600
1632-B Roof Construction
bitmasks constructive algorithms
1000
1632-A ABC
implementation
800
1631-B Fun with Even Subarrays
dp greedy
1100
1631-A Min Max Swap
greedy
800
1630-F Making It Bipartite
flows graph matchings graphs +1
3400
1630-E Expected Components
combinatorics math number theory +1
2900
1630-D Flipping Range
constructive algorithms dp greedy +1
2400
1630-C Paint the Middle
dp greedy sortings +1
2200
1630-B Range and Partition
binary search constructive algorithms data structures +2
1800
1630-A And Matching
bitmasks constructive algorithms
1500
1629-B GCD Arrays
greedy math number theory
800
1629-A Download More RAM
brute force greedy sortings
800
1628-F Spaceship Crisis Management
binary search data structures geometry +1
3500