Submission #746210

#	Time	Username	Problem	Language	Result	Execution time	Memory
746210		rahulverma	Balloons (CEOI11_bal)	Java	60 / 100	2055 ms	31184 KiB

bal

import java.io.*;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.*;
 
public class bal {
 
	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();
				pos = Math.min(pos, dist(coord[top], ans[top], coord[i]));
				if(pos >= ans[top]) stack.pop();
				else break;
			}
			pos = Math.min(pos, maxRad[i]);
			ans[i] = pos;
			stack.add(i);
		}
		PrintWriter pw = new PrintWriter(System.out);
		for(int i = 0; i < n; i++) {
			pw.format("%.3f", (round(ans[i], 3)));
			pw.println();
		}
		pw.close();
	}
	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();
	}
 
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 10 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10