Submission #1066685

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066685		Oz121	Balloons (CEOI11_bal)	Java	Compilation error	0 ms	0 KiB

bal

import java.io.*;
import java.util.*;
public class Balloons {
    public static void main(String[] args) throws IOException {
        BufferedReader scan = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer l1 = new StringTokenizer(scan.readLine()); int num = Integer.parseInt(l1.nextToken()); double[][] 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());
        }

        Stack<Integer> idx = new Stack<>(); double[] ans = new double[num];
        for (int i = 0;i<num;i++) {
            while (!idx.isEmpty()) {
                int j = idx.peek();
                double maxR = Math.pow(arr[i][0]-arr[j][0],2)/(4*ans[j]);

                if (maxR>arr[i][1]) {
                    if (arr[i][1]<=arr[j][1]) {
                        idx.add(i); ans[i] = arr[i][1];
                        break;
                    }
                    else idx.pop();
                } else { //maxR<=arr[i][1]
                    if (maxR<=arr[j][1]) {
                        idx.add(i); ans[i] = maxR;
                        break;
                    }
                    else idx.pop();
                }
            }

            if (idx.isEmpty()) ans[i] = arr[i][1];
            idx.add(i);
        }

        for (double i : ans) System.out.println(i+" ");
    }
}

Compilation message (stderr)

bal.java:3: error: class Balloons is public, should be declared in a file named Balloons.java
public class Balloons {
       ^
1 error