Python pattern

Sorting & ranking

3 problems in this pattern, climbing easy → medium → hard. Pick wherever you're calibrated.

Easy

0 / 1 solved

Top-N customers by spend, tie-broken by name
Python · ~10 min
NEW

Medium

0 / 1 solved

Dense-rank entries with ties
Python · ~12 min
NEW

Hard

0 / 1 solved

Sort records by several keys, NULLs last
Python · ~18 min
NEW