Coding-Practice/programmers/크기가 작은 부분문자열/solution.java

// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/147355

import java.util.stream.LongStream;

class Solution {
    public int solution(String t, String p) {
        long targetNumber = Long.parseLong(p);
        int targetNumberLength = p.length();

        return (int) LongStream.range(0L, t.length() - targetNumberLength + 1L)
                .mapToObj(i -> t.substring((int) i, (int) i + targetNumberLength))
                .mapToLong(Long::parseLong)
                .filter(number -> number <= targetNumber)
                .count();
    }
}