Reverse a String

Problema

Reverse text so the last character comes first.

Implement reverse_string(text).

text: The text to reverse.

Return the reversed text.

0 ≤ length ≤ 10,000

Ejemplo 1

Entrada:
text = "hello"

Salida esperada:
expected = "olleh"

Entrada:
std::string text = "hello";

Salida esperada:
std::string expected = "olleh";

Entrada:
string text = "hello";

Salida esperada:
string expected = "olleh";

h-e-l-l-o read backwards is "olleh".

Ejemplo 2

Entrada:
text = "a"

Salida esperada:
expected = "a"

Entrada:
std::string text = "a";

Salida esperada:
std::string expected = "a";

Entrada:
string text = "a";

Salida esperada:
string expected = "a";

A single character reversed is itself.

Inténtalo primero por tu cuenta y luego abre las pistas una a una.

Pista 1

The answer is the characters in opposite order.

Pista 2

A two-pointer approach or a backward traversal both work well.

Pista 3

Be sure the empty string stays empty after reversal.

Complejidad esperada

O(n) time, O(n) extra space

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