Write a function to count unique characters in a string.
HardProblem Statement
Write a function to count unique characters in a string.
Sample Input
A hardcoded string, e.g., "programming".
Sample Output
Number of unique characters: 8
Limits
Time: 2s · Memory: 256 MB
Code Editor
00:00
fun countUniqueCharacters(input: String): Int {
return input.toSet().size
}
fun main() {
val input = "programming"
println("Number of unique characters: ${countUniqueCharacters(input)}")
}
Input
A hardcoded string, e.g., "programming".
Expected Output
Number of unique characters: 8