Gassa questions

Gassa answers

• It's obligatory to check more than one time visited nodes when using Dijkstra's algorithm?
• Sorting large array of pairs
• Find a path that minimize the difference of sum in upper and lower half in matrix
• The number 0.6 is not converting to a fraction correctly
• Calculate numbers used from a sequence
• Can my algorithm be done any better?
• Number of sub sequences of a given array that are divisible by n
• How to calculate if something lies in someone's field of vision
• Construct back the original string
• Print every nth column of a file