package main

import (
	"fmt"
)

func main() {
	num := 540561
	recipes := []int{3, 7}
	one, two := 0, 1
	for len(recipes)-10 < num+1 {
		//fmt.Println(one, two)
		//fmt.Println(recipes)
		comb := recipes[one] + recipes[two]
		if comb < 10 {
			recipes = append(recipes, comb)
		} else {
			recipes = append(recipes, comb/10, comb%10)
		}

		one = (one + recipes[one] + 1) % len(recipes)
		two = (two + recipes[two] + 1) % len(recipes)
	}
	for _, v := range recipes[num : num+10] {
		fmt.Print(v)
	}
	fmt.Println()
}