Square a Number

Return n multiplied by itself. The square of a negative number is positive.

Implement square_number(n).

Input

n: Any integer in the allowed range.

Output

Return n × n.

Restricciones

−3,000,000,000 ≤ n ≤ 3,000,000,000, so the square fits a signed 64-bit integer.

Ejemplos

Entrada:
n = 12

Salida esperada:
expected = 144

Entrada:
long long n = 12;

Salida esperada:
long long expected = 144;

Entrada:
long n = 12;

Salida esperada:
long expected = 144;

Entrada:
n = -7

Salida esperada:
expected = 49

Entrada:
long long n = -7;

Salida esperada:
long long expected = 49;

Entrada:
long n = -7;

Salida esperada:
long expected = 49;