import java.io.*;
import java.util.*;
public class M=mobile {
public static int num; public static double[][] arr;
public static void main(String[] args) throws IOException {
BufferedReader scan = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer l1 = new StringTokenizer(scan.readLine()); num = Integer.parseInt(l1.nextToken()); int L = Integer.parseInt(l1.nextToken()); arr = new double[num][2];
for (int i = 0;i<num;i++) {
StringTokenizer st = new StringTokenizer(scan.readLine());
arr[i][0] = Integer.parseInt(st.nextToken());
arr[i][1] = Integer.parseInt(st.nextToken());
}
double l = 0; double h = Math.pow(10,9);
while (h-l>Math.pow(10,-3)) {
double mid = (l+h)/2; boolean work = true;
double[][] endpoints = getEndpoints(mid);
Arrays.sort(endpoints, (i,j)->Double.compare(i[0],j[0]));
/*System.out.println(" "+mid);
for (int i = 0;i<num;i++) {
System.out.println(endpoints[i][0]+" "+endpoints[i][1]);
}
System.out.println("--------");*/
double left = endpoints[0][0]; double right = endpoints[0][1];
for (int i = 1;i<num;i++) {
if (endpoints[i][0]>right) work = false;
left = Math.min(left, endpoints[i][0]); right = Math.max(right, endpoints[i][1]);
}
work = (work)&&(left<=0&&right>=L);
if (work) h = mid;
else l = mid;
}
System.out.println((l+h)/2);
}
public static double[][] getEndpoints (double r) {
double[][] endpoints = new double[num][2];
for (int i = 0;i<num;i++) {
endpoints[i][0] = arr[i][0]-Math.sqrt(r*r-arr[i][1]*arr[i][1]);
endpoints[i][1] = arr[i][0]+Math.sqrt(r*r-arr[i][1]*arr[i][1]);
}
return endpoints;
}
}
Compilation message
mobile.java:3: error: '{' expected
public class M=mobile {
^
1 error
