Category: beginner

Unlike Delphi, the string in C# is type of object. Therefore, you can reference the Length property to obtain the length of the string. However, when null value is …

The problem is from codeforces: http://www.codeforces.com/problemset/problem/239/A It is a simple math problem: finding the numbers x that satisify where y, k, and n are given;

Algorithm complexity can be represented by Big O notation, for example, the following piece of code has complexity that sums up the array. s = 0 arr = for …

The polygons can be regular or irregular. For example, The following idea is the easiest way to compute its area (signed) for any given simple 2-D polygons, even for …

The problem is from codeforces: http://www.codeforces.com/problemset/problem/237/A If there are two or more people coming to buy at the same time, and there is no enough cashers, just simply increase …