Quixotic questions

• Sum() in python
• Does this invoke undefined behaviour?
• Case-insenstive ordered word search via regular expression
• Taking input from stdin after freopen()
• Summing up digits !
• Is this a valid C statement?
• Precision in python
• Is it possible to solve this?
• Edit distance between two regular expression
• How can we compute N choose K modulus a prime number without overflow?

Quixotic answers