package main

import "fmt"

func mertens(to int) ([]int, int, int) {
    if to < 1 {
        to = 1
    }
    merts := make([]int, to+1)
    primes := []int{2}
    var sum, zeros, crosses int
    for i := 1; i <= to; i++ {
        j := i
        cp := 0