Previous date

You are given a date: day $d$, month $m$, year $y$. Write a function PrevDate(d, m, y) that returns the date of the previous day. Helper functions are useful: IsLeapYear(y) — is the year a leap year, MonthDays(m, y) — the number of days in a month.

A leap year is divisible by $4$, but among years divisible by $100$ only those divisible by $400$ are leap years. February has $29$ days in a leap year and $28$ otherwise.

A single line with three integers $d$, $m$, $y$ — a valid date ($2 \le y \le 9999$).

A single line with three numbers: the day, month and year of the previous day.

Three cases: $d > 1$ — the day minus one; $d = 1$, $m > 1$ — the last day of the previous month (given by MonthDays); January $1$ — December $31$ of the previous year. In the first example: 29 2 2004 ($2004$ is a leap year).