Problems

Easy · Geometry

Easy · Brute force · String suffix structures

Hard · Geometry

Hard · Geometry

Medium · Brute force · Combinatorics · Graphs

Very easy · Brute force

Medium · Dynamic programming · Strings

Very easy · Strings

Medium · Fenwick Tree · Data Structures

Easy · Dynamic programming

Very easy · Graphs

Easy · Brute force · String suffix structures

Very hard · Graphs · Depth-first Search

Very easy · Implementation

Easy · Sorting

Easy · Graphs

Medium · Probabilities · Math · Greedy algorithms

Very hard · Graphs · Shortest paths

Very easy · Number theory · Math

Very hard · Implementation · Dynamic programming

Very hard · Greedy algorithms · Sorting

Very hard · Geometry · Greedy algorithms

Very hard · Dynamic programming · Sorting

Very hard · Brute force · Geometry · Dynamic programming

Very hard · Geometry