Function advent_of_code_2023::day_3::sum_gear_ratios

source · 
fn sum_gear_ratios(
    part_numbers: &Vec<PartNumber>,
    symbol_lookup: &HashMap<(usize, usize), char>
) -> u32
Expand description

Solution to part 2 - finds all the valid gears and sums the multiplications of their “gear ratio” numbers.