Submission #3418788

---

Source Code Expand

package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"strconv"
)

var (
	readString func() string
	stdout     *bufio.Writer
)

func init() {
	readString = newReadString(os.Stdin)
	stdout = bufio.NewWriter(os.Stdout)
}

func newReadString(ior io.Reader) func() string {
	r := bufio.NewScanner(ior)
	r.Buffer(make([]byte, 1024), int(1e+11))
	r.Split(bufio.ScanWords)

	return func() string {
		if !r.Scan() {
			panic("Scan failed")
		}
		return r.Text()
	}
}

func readInt() int {
	return int(readInt64())
}

func readInt64() int64 {
	i, err := strconv.ParseInt(readString(), 0, 64)
	if err != nil {
		panic(err.Error())
	}
	return i
}

func readIntSlice(n int) []int {
	b := make([]int, n)
	for i := 0; i < n; i++ {
		b[i] = readInt()
	}
	return b
}

func readLengthAndSlice() (int, []int) {
	n := readInt()
	return n, readIntSlice(n)
}

func printf(f string, args ...interface{}) (int, error) {
	return fmt.Fprintf(stdout, f, args...)
}

func println(args ...interface{}) (int, error) {
	return fmt.Fprintln(stdout, args...)
}

func eprintln(args ...interface{}) (int, error) {
	return fmt.Fprintln(os.Stderr, args...)
}

// readString() string
// readInt() int
// readIntSlice(n int) []int
// readLengthAndSlice() []int

// -----------------------------------------------------------------------------

func rev(a []int, start, end int) {
	for i, j := start, end; i < j; i, j = i+1, j-1 {
		a[i], a[j] = a[j], a[i]
	}
}

func rot(a []int, x int) {
	x = x % len(a)
	rev(a, 0, x-1)
	rev(a, x, len(a)-1)
	rev(a, 0, len(a)-1)
}

func swap(a []int, x int) {
	i := x
	j := x + 1
	a[i], a[j] = a[j], a[i]
}

func main() {
	defer stdout.Flush()
	n := readInt()
	a := []int{1, 2, 3, 4, 5, 6}

	m := n % 30
	rot(a, m/5)
	for i := 0; i < m%5; i++ {
		swap(a, i)
	}
	for _, v := range a {
		printf("%d", v)
	}
	println()
}

// -----------------------------------------------------------------------------

Submission Info

Judge Result