Submission #1129916

#	Time	Username	Problem	Language	Result	Execution time	Memory
1129916		APerson	Mobile (BOI12_mobile)	Java	Compilation error	0 ms	0 KiB

mobile

import java.util.*;
public class Mobile {
    static int n, l;
    static Point[] p;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        n = sc.nextInt();
        l = sc.nextInt();
        p = new Point[n];
        for(int i = 0; i < n; i++) p[i] = new Point(sc.nextDouble(), sc.nextDouble());
        double min = 0; double max = 1e10;
        while(max-min > 1e-3) {
            double mid = (max+min)/2;
            if(works(mid)) min = mid;
            else max = mid;
        }
        System.out.println(min);
        sc.close();
    }
    public static boolean works(double x) {
        Interval[] intervals = new Interval[n];
        for(int i = 0; i < n; i++) {
            double xDist = Math.sqrt(x*x-p[i].y*p[i].y);
            intervals[i] = new Interval(p[i].x-xDist, p[i].x+xDist);
        }
        Arrays.sort(intervals, Comparator.comparing(a -> a.l));
        double last = 0;
        for(int i = 0; i < n; i++) {
            if(last >= l) return false;
            if(intervals[i].l > last) return true;
            last = Math.max(last, intervals[i].r);
        }
        return last < l;
    }
    public static class Interval {
        double l, r;
        public Interval(double l, double r) {
            this.l = l;
            this.r = r;
        }
    }
    public static class Point {
        double x, y;
        public Point(double x, double y) {
            this.x = x;
            this.y = Math.abs(y);
        }
    }
}

Compilation message (stderr)

mobile.java:2: error: class Mobile is public, should be declared in a file named Mobile.java
public class Mobile {
       ^
1 error

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