Problems Playground
Login
Min rating
Max rating
Tag
Reset
# Problem Tags Rating Solved
1450-E Capitalism
constructive algorithms dfs and similar graphs +1
2700
1450-D Rating Compression
binary search data structures greedy +2
1800
1450-C2 Errich-Tac-Toe (Hard Version)
constructive algorithms math
2300
1450-C1 Errich-Tac-Toe (Easy Version)
constructive algorithms math
2100
1450-B Balls of Steel
brute force geometry greedy
1000
1450-A Avoid Trygub
constructive algorithms sortings
800
1447-B Numbers Box
greedy math
1000
1447-A Add Candies
constructive algorithms math
800
1446-F Line Distance
binary search data structures geometry
3200
1446-E Long Recovery
constructive algorithms dfs and similar
3500
1446-D2 Frequency Problem (Hard Version)
data structures greedy two pointers
3000
1446-D1 Frequency Problem (Easy Version)
data structures greedy
2600
1446-C Xor Tree
binary search bitmasks data structures +3
2100
1446-B Catching Cheaters
dp strings
1800
1446-A Knapsack
constructive algorithms greedy sortings
1300
1445-B Elimination
greedy math
900
1445-A Array Rearrangment
greedy sortings
800
1444-E Finding the Vertex
brute force dfs and similar dp +2
3500
1444-D Rectangular Polyline
constructive algorithms dp geometry
2900
1444-C Team-Building
data structures dfs and similar dsu +1
2500
1444-B Divide and Sum
combinatorics math sortings
1900
1444-A Division
brute force math number theory
1500
1443-E Long Permutation
brute force math two pointers
2400
1443-C The Delivery Dilemma
binary search greedy sortings
1400
1443-B Saving the City
dp greedy math +1
1300
1443-A Kids Seating
constructive algorithms math
800
1442-F Differentiating Games
games interactive
3400
1442-E Black, White and Grey Tree
binary search constructive algorithms dfs and similar +3
3000
1442-D Sum
data structures divide and conquer dp +1
2800
1442-C Graph Transpositions
dfs and similar graphs greedy +1
2400
1442-B Identify the Operations
combinatorics data structures dsu +2
1800
1442-A Extreme Subtraction
constructive algorithms dp greedy
1800
1440-B Sum of Medians
greedy math
900
1440-A Buy the String
implementation math
800
1439-E Cheat and Win
bitmasks data structures games +1
3500
1439-D INOI Final Contests
combinatorics dp fft
3100
1439-C Greedy Shopping
binary search data structures divide and conquer +2
2600
1439-B Graph Subset Problem
constructive algorithms data structures graphs
2600
1439-A2 Binary Table (Hard Version)
constructive algorithms graphs greedy +1
1900
1439-A1 Binary Table (Easy Version)
constructive algorithms implementation
1500
1438-F Olha and Igor
interactive probabilities trees
3000
1438-E Yurii Can Do Everything
binary search bitmasks brute force +3
2500
1438-D Powerful Ksenia
bitmasks constructive algorithms math
2200
1438-C Engineer Artem
2-sat chinese remainder theorem constructive algorithms +2
2000
1438-B Valerii Against Everyone
constructive algorithms data structures greedy +1
1000
1438-A Specific Tastes of Andre
constructive algorithms implementation
800
1437-G Death DBMS
data structures string suffix structures strings +1
2600
1437-F Emotional Fishermen
combinatorics dp math +1
2600
1437-E Make It Increasing
binary search constructive algorithms data structures +2
2200
1437-D Minimal Height Tree
graphs greedy shortest paths +1
1600