华为OD机试-路灯照明问题

import java.util.stream.IntStream;

public class Main {
    public static void main(String[] args) {
        int[] lights = new int[]{50, 70, 20, 70};
        int total = IntStream.range(0, lights.length - 1).map(idx -> 100 - lights[idx] - lights[idx + 1]).filter(area -> area > 0).sum();
        System.out.println(total);
    }
}