| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1067961 |
2024-08-21T06:11:19 Z |
Oz121 |
Mobile (BOI12_mobile) |
Java 11 |
|
1000 ms |
131072 KB |
import java.io.*;
import java.util.*;
public class mobile {
public static int num; public static double[][] arr;
public static void main(String[] args) throws IOException {
FastIO io = new FastIO(); num = io.nextInt(); int L = io.nextInt(); arr = new double[num][2];
for (int i = 0;i<num;i++) {
arr[i][0] = io.nextInt(); arr[i][1] = io.nextInt();
}
double l = 0; double h = Math.pow(10,9);
while (h-l>Math.pow(10,-3)) {
double mid = (l+h)/2; boolean work = true;
ArrayList<Pair> endpoints = getEndpoints(mid);
if (endpoints.isEmpty()) {l = mid; continue;}
double left = Integer.MAX_VALUE; double right = endpoints.get(0).r;
for (int i = 1;i<endpoints.size();i++) { //If [left,right] and [endpoints.get(i).l,endpoints.get(i).r] overlap, take union
double newL = endpoints.get(i).l; double newR = endpoints.get(i).r;
if (newL<=right) right = Math.max(right, newR);
if (left<=newR) left = Math.min(left, newL);
}
work = left<=0&&right>=L;
if (work) h = mid;
else l = mid;
}
io.println((l+h)/2); io.close();
}
public static ArrayList<Pair> getEndpoints (double r) {
ArrayList<Pair> endpoints = new ArrayList<>();
for (int i = 0;i<num;i++) {
if (r*r-arr[i][1]*arr[i][1]<0) continue;
endpoints.add(new Pair(arr[i][0]-Math.sqrt(r*r-arr[i][1]*arr[i][1]),
arr[i][0]+Math.sqrt(r*r-arr[i][1]*arr[i][1])));
}
return endpoints;
}
public static class Pair {
double l; double r;
public Pair (double l, double r) {
this.l = l; this.r = r;
}
}
public static class FastIO extends PrintWriter {
private InputStream stream;
private byte[] buf = new byte[1 << 16];
private int curChar;
private int numChars;
// standard input
public FastIO() { this(System.in, System.out); }
public FastIO(InputStream i, OutputStream o) {
super(o);
stream = i;
}
public FastIO(String i, String o) throws IOException {
super(new FileWriter(o));
stream = new FileInputStream(i);
}
// throws InputMismatchException() if previously detected end of file
private int nextByte() {
if (numChars == -1) { throw new InputMismatchException(); }
if (curChar >= numChars) {
curChar = 0;
try {
numChars = stream.read(buf);
} catch (IOException e) { throw new InputMismatchException(); }
if (numChars == -1) {
return -1; // end of file
}
}
return buf[curChar++];
}
public int nextInt() { // nextLong() would be implemented similarly
int c;
do { c = nextByte(); } while (c <= ' ');
int sgn = 1;
if (c == '-') {
sgn = -1;
c = nextByte();
}
int res = 0;
do {
if (c < '0' || c > '9') { throw new InputMismatchException(); }
res = 10 * res + c - '0';
c = nextByte();
} while (c > ' ');
return res * sgn;
}
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
52 ms |
25696 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
56 ms |
22792 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
80 ms |
28824 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
93 ms |
24128 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
84 ms |
24176 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
87 ms |
24232 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
331 ms |
30040 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
335 ms |
36704 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
324 ms |
35108 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
264 ms |
40668 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
262 ms |
41868 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1031 ms |
119496 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1071 ms |
123452 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
493 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
537 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
477 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
421 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
387 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
427 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
378 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
417 ms |
131072 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
