Want to climb rating fast? Here’s the simplest 10-topic roadmap that actually works:

• Basic Programming (Fast I/O, loops, vectors, strings)
• Greedy
• Binary Search
• Two Pointers
• Sorting + Simple Math (GCD, modulo)
• Prefix Sums / Difference Arrays
• Basic 1D DP
• Graphs – BFS + DFS
• Number Theory (Sieve, primes, modular inverse)
• Basic Data Structures (Stack, Queue, Set, Map, Priority Queue)

Fastest Practice Plan:

• 1 topic per week
• Solve only 800–1200 rated problems
• Focus on Div.2 A → B → C (then D)

Start here: https://codeforces.me/problemset?tags=800-1200&order=problem_rating_ASC Follow this and you can go Newbie → Pupil → Specialist → Expert in just 3–6 months!