Given a year how can i find mounths with 5 sundays in it?

[Robin Sakoda]

Given a year how can i find mounths with 5 sundays in it?

Example input:2011
output:jan n feb

[Rabbit]

Math and common sense suggests that there are only 14 scenarios. 7 for non-leap years and 7 for leap years. Each one based on what day of the week a year starts on. Further analysis may consolidate some scenarios or reveal a pattern. It's time for you to get out a calendar.