Gassa questions

Gassa answers

• How to calculate if something lies in someone's field of vision
• Construct back the original string
• Print every nth column of a file
• Minimum number of lasers required to cover cells in grid?
• Generate random numbers from 1 to n without duplicate in O(1) space
• Control an interactive process using D
• Minimal path to form a string
• Find subset of size k such that the minimum distance between values is maximum
• What is the syntax for declaring a constant string[char] AA?
• Is there any difference between the following algorithms for shuffling arrays?