Description

Given a string, find the number of different characters in it.

Example

For s = "cabca", the output should be differentSymbolsNaive(s) = 3.

There are 3 different characters a, b and c.

Input/Output

• [execution time limit] 4 seconds (js)

• [input] string s

A string of lowercase English letters.

Guaranteed constraints: 3 ≤ s.length ≤ 1000.

• [output] integer

[JavaScript (ES6)] Syntax Tips

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// Prints help message to the console
// Returns a string
function helloWorld(name) {
    console.log("This prints to the console when you Run Tests");
    return "Hello, " + name;
}