Without repetition 4
Very easy
Execution time limit is 1 second
Runtime memory usage limit is 64 megabytes
The program takes a string composed solely of English letters as input. Your task is to output this string with each letter appearing only once, in the order of its first occurrence in the input.
Input
A single string of English letters.
Output
The string with each letter appearing only once, maintaining the order of their first appearance.
Examples
Input #1
Answer #1
Submissions 2K
Acceptance rate 61%