Problem:
Score : 100 points

Problem Statement

Takahashi is going to set a 3-character password.

How many possible passwords are there if each of its characters must be a digit between 1 and N (inclusive)?

Constraints

1 \leq N \leq 9

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print the number of possible passwords.

Sample Input 1

2

Sample Output 1

8

There are eight possible passwords: 111, 112, 121, 122, 211, 212, 221, and 222.

Sample Input 2

1

Sample Output 2

1

There is only one possible password if you can only use one kind of character.

Solution in Go (1.6) (judge verdict: Accepted)

package main

import (
  "fmt"
)

func pow(args ...int) int {
  x, y := args[0], args[1]
  res := 1
  if len(args) == 3 {
    mod := args[2]
    for y != 0 {
      if y & 1 == 1 {res = res * x % mod}
      y >>= 1
      x = x * x % mod
    }
  }  else {
    for y != 0 {
      if y & 1 == 1 {res *= x}
      y >>= 1
      x *= x
    }
  }
  return res
}

func main() {
  var n int
  fmt.Scan(&n)
  fmt.Println(pow(n, 3))
}