day11_part1.jakt

/// Expect:
/// - output: "243,64\n"

function main() {
    let serial_number = 5468

    mut power_grid: [i16:[i16:i8]] = [:]

    for x in 1i16..301i16 {
        for y in 1i16..301i16 {
            let rack_id = (x as! i64) + 10
            let power_level = ((rack_id * (y as! i64)) + serial_number) * rack_id

            mut hundreds_digit = 0u8
            if power_level > 100 {
                let digits = format("{}", power_level)
                hundreds_digit = digits.byte_at(digits.length() - 3) - 48
            }

            let final_power_level = (hundreds_digit as! i8) - 5

            if not power_grid.contains(x) {
                power_grid[x] = [:]
            }

            power_grid[x][y] = final_power_level
        }
    }

    mut largest_x_coord = 0i16
    mut largest_y_coord = 0i16
    mut largest_amount = 0

    for x in 1i16..(301i16-3i16) {
        for y in 1i16..(301i16-3i16) {
            let amount: i64 = power_grid[x][y] + 
                power_grid[x+1][y] + 
                power_grid[x+2][y] + 
                power_grid[x][y+1] + 
                power_grid[x+1][y+1] + 
                power_grid[x+2][y+1] + 
                power_grid[x][y+2] + 
                power_grid[x+1][y+2] + 
                power_grid[x+2][y+2]

            if amount > largest_amount {
                largest_amount = amount
                largest_x_coord = x
                largest_y_coord = y
            }
        }
    }

    println("{},{}", largest_x_coord, largest_y_coord)
}