Tuples — Pack, Unpack and Swap

Implement solve(pairs) that receives a list of 2-element tuples (a, b) and returns a new list where each tuple has its elements swapped: (b, a).

Also implement solve_stats(numbers) that returns a tuple (minimum, maximum, total) for a list of numbers.

Since Judge0 uses a single entry point, implement solve(data, mode):

• If mode == "swap": data is a list of 2-tuples → return list of swapped tuples.
• If mode == "stats": data is a list of numbers → return (min, max, sum).

Examples

• solve([(1, 2), (3, 4)], "swap") → [(2, 1), (4, 3)]
• solve([3, 1, 4, 1, 5], "stats") → (1, 5, 14)