Problems

Very easy · Math

Hard · Number theory · Greedy algorithms · Hashing

Hard · Combinatorics · Number theory · Hashing · Data Structures

Hard · Ternary search · Math · Greedy algorithms

Very hard · Graphs · Binary Search · Data Structures · Dynamic programming · Combinatorics · Prefix Sums

Very easy · Brute force

Medium · Number theory · Prime factorization

Medium · Games · Math

Medium · Greedy algorithms · Constructive Algorithms

Very hard · Dynamic programming · Bitwise Operations · Number theory

Easy · Brute force · Number theory

Easy · Brute force · Math

Very hard · Segment Tree · Data Structures · SQRT Decomposition

Very hard · Interactive · Binary Search · Constructive Algorithms · Strings

Hard · Dijkstra algorithm · Number theory · Greedy algorithms · Shortest paths

Very easy · Math

Easy · Brute force · Strings

Easy · Prefix Sums · Greedy algorithms

Medium · Greedy algorithms · Bitwise Operations

Hard · Number theory · Combinatorics · Prime factorization

Medium · Greedy algorithms · Priority Queue · Sorting

Medium · Greedy algorithms · Sorting · Math

Easy · Brute force · Number theory

Hard · SQRT Decomposition · Prefix Sums · Bitwise Operations

Hard · Trees · Binary Search · Greedy algorithms