Counterflow

**Sudoku, Arrows, Cages** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Arrows: Digits along an arrow must sum to the number indicated in the circle from which the arrow emerges. Digits may repeat along arrows if allowed by other rules. - Cages: Digits in cages cannot repeat and must sum to the value shown in the upper left corner of the cage.