Status: IN
For 4-digit number splitting, sorting digits ascending and assigning the two smallest to tens places minimizes the two-number sum. The specific pairing assignment is irrelevant — `(0,2)+(1,3)` and `(0,3)+(1,2)` yield identical sums.
Source: entries/2026/06/06/minimum-sum-of-four-digit-number-after-splitting-digits-solution.md