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Submission #746207

# Submission time Handle Problem Language Result Execution time Memory
746207 2023-05-21T22:32:06 Z rahulverma Balloons (CEOI11_bal) Java 11
50 / 100
 2000 ms 29176 KB 
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);
		}
		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();
	}

}
/*
3
0 9
8 1
13 7 
4
0 1
15 9
23 1
38 7*/

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 9204 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 9276 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 177 ms 10308 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 811 ms 21436 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1859 ms 22612 KB 20000 numbers

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2059 ms 29176 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2063 ms 25352 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2047 ms 25804 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2040 ms 26440 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2060 ms 26240 KB Time limit exceeded
2 Halted 0 ms 0 KB -