Freaks City

Problem Description A subsequence is obtained from a string by deleting zero or more characters without changing the order of remaining elements. The original string qualifies as its own subsequence. For a given lowercase string s of length n (1 ≤ n ≤ 1000), count how many subsequences contain exactly k ditsinct letter types (1 ≤ k ≤ 26). Retur ...

This article delves into advanced backtracking techniques for solving common algorithmic problems, specifically focusing on generating increasing subsequences and permutations, including handling duplicates. Generating Increasing Subsequences (Problem 491) Given an integer array, the task is to find all increasing subsequences with a length of ...

Problem A - Sum of Two Smallest Numbers Statement: Given three integers, output the sum of the two smallest values. Solution: Subtract the maximum value from the total sum. int a, b, c; cin >> a >> b >> c; cout << a + b + c - max({a, b, c}) << endl; Problem B - Finding the Longest Even Prefix Statement: A string i ...