Initial value for variables is very important in C++. If a variable is in the wrong scope, errors can appear, or it won’t give the expected outcome. For example, if a variable is declared in a for loop, and it is used in a function, the announced variable will not…
Day: December 26, 2021
CCC ’18 J4 (S2)
Matrices are among an important group in coding problems. Matrix rotations are also vital. For instance, QR codes can be read even when it is rotated 90°. Take the coding problem below as an example: https://dmoj.ca/problem/ccc18s2 This is a matrix problem. At first glance, people might thnk that the data…