제출 #746196

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
746196		rahulverma	Balloons (CEOI11_bal)	Java	컴파일 에러	0 ms	0 KiB

bal

import java.io.*;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.*;

public class balloons {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		int[] coord = new int[n];
		int[] maxRad = new int[n];
		double[] ans = new double[n];
		for(int i = 0; i < n; i++) {
			StringTokenizer st = new StringTokenizer(br.readLine());
			coord[i] = Integer.parseInt(st.nextToken());
			maxRad[i] = Integer.parseInt(st.nextToken());
		}
		ans[0] = maxRad[0];
		Stack<Integer> stack = new Stack<Integer>();
		stack.add(0); // indexes in the stack
		for(int i = 1; i < n; i++) {
			double pos = maxRad[i];
			while(!stack.isEmpty()) {
				int top = stack.peek();
				double distance = dist(coord[top], ans[top], coord[i]);
				if(distance < maxRad[i]) {
					stack.pop();
					pos = distance;
				}
				else {
					pos = maxRad[i];
					break;
				}
			}
			ans[i] = pos;
			stack.add(i);
		}
		for(int i = 0; i < n; i++) {
			System.out.format("%.3f", (round(ans[i], 3)));
			System.out.println();
		}
	}
	public static double dist(int x1, double r1, int x2) {
		double x_1 = x1;
		double x_2 = x2;
		return (x_1 - x_2) * (x_1 - x_2) / (4*r1);
	}
	private static double round(double value, int places) {
	    if (places < 0) throw new IllegalArgumentException();

	    BigDecimal bd = new BigDecimal(Double.toString(value));
	    bd = bd.setScale(places, RoundingMode.HALF_UP);
	    return bd.doubleValue();
	}

}

컴파일 시 표준 에러 (stderr) 메시지

bal.java:6: error: class balloons is public, should be declared in a file named balloons.java
public class balloons {
       ^
1 error