package main

import (
	"bufio"
	"log"
	"os"
)

// readlines reads lines from stdin.
// Then it returns them as an array of strings
func readlines() []string {
	lines := []string{}

	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		lines = append(lines, scanner.Text())
	}

	if err := scanner.Err(); err != nil {
		log.Fatal(err)
	}

	return lines
}

// anyTrue checks if any digits passed
func anyTrue(digits []digit) bool {
	for _, digit := range digits {
		if digit.pass {
			return true
		}
	}
	return false
}