You know standard DP patterns like knapsack, LIS, and grid paths. In this section, I'll go beyond those basics into techniques that appear in Codeforces - rated problems.
You'll work through bitmask DP for subset states, digit DP for counting numbers with constraints, interval DP for range problems, tree DP for hierarchical structures, and contribution counting for expected value calculations.
Each problem teaches a specific technique. By the end, you'll recognize which approach fits each problem type.