Coding Problems

Given a year and day difference, compute the resulting date without using built-in date libraries. Handle leap years, mo...

Given tasks with dependencies and durations, find minimum time to complete all tasks using k parallel workers. Tasks can...

A function f(n) recursively calls itself until the sum of digits of n becomes a single digit. Count the total number of...

Encrypt a message by writing it into an N×N grid row by row, then reading it diagonally from top-left to bottom-right. H...

Given a directed graph of routers and packet counts flowing through them, find which router will fail first when it exce...

Find the Nth digit in the infinite sequence formed by concatenating positive integers: 123456789101112131415... The sequ...

Calculate the Nth term of a modified Fibonacci sequence where F(0)=1, F(1)=2, and F(n)=F(n-1)*F(n-2) % 1000 for n≥2. Fin...

Given an array of integers, find the sum of all prime numbers that appear exactly once in the array. A number must be bo...

Count how many numbers between 1 and N (inclusive) have equal number of 0s and 1s in their binary representation (withou...

Rotate the digits of a number by one position to the left each time until the number repeats (forms a cycle). Count how...