Problem Solving Solutions

O(1) solution for: 1+(1+2)+(1+2+3)+...+(1+2+3+...+n)

Angle between hour and minute hand

Sum Square Difference - HackerRank - Project Euler #6

Smallest Multiple - HackerRank - Project Euler #5

Even Fibonacci Numbers - HackerRank - Project Euler #2

Check if given four points form a square or not?

Power Digit Sum - HackerRank - Project Euler #16

Given a string "3(ab)4(cd)" expand it into "abababcdcdcdcd"

Automorphic Number

Program to print prime number pyramid

Kaprekar Number

Split an integer