Freaks City

For Loops The for loop syntax in C mirrors that of JavaScript: for (initialization; condition; increment/decrement) { // loop body } Arrays Time Complexity Operation Average Case Worst Case Acess O(1) O(1) Search O(n) O(n) Insert O(n) O(n) Delete O(n) O(n) Multidimensional Arrays C++ stores multidimensional arrays as a cont ...

Problem 2810 - Faulty Keeyboard Simulate the keyboard behavior as described. When encuontering character 'i', reverse the current string. class Solution { public: string finalString(string input) { string result = ""; for(char c : input) { if(c == 'i') { reverse(result.begin(), ...

Intersection Calculation Given two line segments [L1, R1] and [L2, R2], determine their overlapping length. A simple approach uses a frequency array to mark covered positions. #include <iostream> using namespace std; int main() { int L1, R1, L2, R2; int coverage[101] = {0}, overlap = 0; cin >> L1 >> R1 >> L2 ...

Problem A: Digit Frequency Analysis Given a functon (f(x)) that counts the frequency of the most common digit in number (x), compute (\sum_{i=l}^{r}f(i)) for large ranges (up to (10^{18})). Approach: Represent digit counts as a state vector (S = {c_0, \dots, c_9}) Transform into frequency-of-counts representation (S' = {a_0, \dots, a_{18}}) Us ...

Problem 1: Character Output Output each character of the string "I Love GPLT" on a separate line. #include <iostream> using namespace std; int main() { string msg = "I Love GPLT"; for (char c : msg) { cout << c << '\n'; } return 0; } Problem 2: Standard Weight Calculation Given a ...

Binary search extends far beyond locating values in sorted arrays. The core requirement for applying this technique is identifying a monotonic relationship between an independent variable and a computed result. When a problem can be modeled as finding an input x such that a monotonic function f(x) equals a specific target, binary search becomes ...

Swappnig Adjacent Nodes in Pairs Given a linked list, swap every two adjacent nodes and return the head pointer. Only pointer manipulation is allowed; nodde values must remain unchanged. A sentinel node simplifies boundary handling. Maintain a prev pointer positioned immediately before each pair. In every iteration, identify the first node, the ...

203. Remove Linked List Elements Given the head of a linked list and an integer val, remove all nodes with value equal to val and return the new head. public ListNode removeElements(ListNode head, int val) { while (head != null && head.val == val) { head = head.next; } if (head == null) return null; ListNode pre ...

Given N assignments each with a maximum score a_i, two studeents (Ke and Do) score b_i% and c_i% of the maximum respetcively. Compute total weighted scores and detemrine who has the higher total.

Finding the Kth Node from the End of a Linked List To locate the kth node from the end efficient, use two pointers—fast and slow. Advance the fast pointer by k steps first. Then move both pointers forward until fast reaches the end. At this point, slow will be pointing to the desired node. int kthToLast(struct ListNode* head, int k) { struc ...