Problems
Marina Vitaliivna's Favorite Game#10128
Medium · Brute force
Collectors' Bazaar in the City of Palaputra#10129
Medium · Implementation
Squares#10138
Easy · Implementation · Brute force
Stepan's House#10139
Medium · Implementation
Shower cabin#10140
Very easy · Implementation
Interesting Sorting#10141
Medium · Sorting
Increasing sines#10145
Very easy · Brute force · Math
Tree Next#10146
Easy · Trees · Binary Search
Tree Previous#10147
Easy · Trees · Binary Search
Costume Party#10148
Easy · Sorting · Two pointers
Election Time#10149
Easy · Sorting · Greedy algorithms
iCow#10150
Easy · Brute force
Cow Contest#10151
Very easy · Graphs
Running#10152
Easy · Dynamic programming
Telephone Lines#10153
Easy · Binary Search · Graphs
Artificial Lake#10154
Hard · Greedy algorithms · Sorting · Data Structures · Stacks
Haybale Guessing#10155
Hard · Segment Tree · Sorting · Range queries
Cell Phone Network#10156
Medium · Dynamic programming · Trees · Depth-first Search · Greedy algorithms
Transitive closure#10157
Medium · Depth-first Search · Graphs
Find the centroid#10158
Very easy · Trees
Building a Decomposition#10159
Easy · Trees
Number of pairs#10160
Easy · Graphs
IOI#10161
Medium · Graphs · Trees