Problem:
Score : 100 points

Problem Statement

Given an integer a as input, print the value a + a^2 + a^3.

Constraints

1 \leq a \leq 10

a is an integer.

Input

Input is given from Standard Input in the following format:

a

Output

Print the value a + a^2 + a^3 as an integer.

Sample Input 1

2

Sample Output 1

14

When a = 2, we have a + a^2 + a^3 = 2 + 2^2 + 2^3 = 2 + 4 + 8 = 14.

Print the answer as an input. Outputs such as 14.0 will be judged as incorrect.

Sample Input 2

10

Sample Output 2

1110

Solution in Kotlin (1.3.71) (judge verdict: Accepted)

import java.io.BufferedReader

fun main() {
    val br = System.`in`.bufferedReader()
    val a = br.readInt()
    print(a + a * a + a * a * a)
}

private const val SPACE_INT = ' '.toInt()
private const val ZERO_INT = '0'.toInt()
private const val NL_INT = '\n'.toInt()

private fun BufferedReader.readInt(): Int {
    var ret = read()
    while (ret <= SPACE_INT) {
        ret = read()
    }
    val neg = ret == '-'.toInt()
    if (neg) {
        ret = read()
    }
    ret -= ZERO_INT
    var read = read()
    while (read >= ZERO_INT) {
        ret *= 10
        ret += read - ZERO_INT
        read = read()
    }

    while (read <= SPACE_INT && read != -1 && read != NL_INT) {
        mark(1)
        read = read()
    }
    if (read > SPACE_INT) {
        reset()
    }
    return if (neg) -ret else ret
}