Submission #1042246

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1042246	2024-08-02T17:40:18 Z	sssamui	Mobile (BOI12_mobile)	C++17	0 / 100	697 ms	17324 KB

mobile

#include <iostream>
#include <cstdio>
#include <vector>
#include <cmath>
#include <stack>
#include <iomanip>
using namespace std;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int n;
	double L;
	cin >> n >> L;
	vector<pair<double, double>> xy(n);
	for (int i = 0; i < n; i++) cin >> xy[i].first >> xy[i].second;

	double l = 0, r = 1e9;
	int it = 45;
	while (it--)
	{
		double m = (l + r) / 2;
		stack<pair<double, double>> c;
		for (int i = 0; i < n; i++) if (xy[i].second * xy[i].second <= m * m)
		{
			double sq = sqrt(m * m - xy[i].second * xy[i].second);
			double a = fmax(0, xy[i].first - sq), b = fmin(L, xy[i].first + sq);
			while (!c.empty() && (c.top().second >= a))
			{
				a = fmin(a, c.top().first), b = fmax(b, c.top().second);
				c.pop();
			}

			c.push({ a, b });
		}

		if ((c.size() != 1) || ((c.top().first > 0) || (c.top().second < L))) l = m;
		else r = m;
	}

	cout << fixed << setprecision(3) << l;
}

Subtask #1
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #2
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #3
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	2 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #4
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	536 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #6
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	3 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #7
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	54 ms	1644 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #8
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	46 ms	1624 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #9
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	50 ms	1628 KB	Output is correct
2	Correct	51 ms	1628 KB	Output is correct
3	Correct	45 ms	1628 KB	Output is correct
4	Incorrect	65 ms	2128 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	68 ms	1880 KB	Output is correct
2	Correct	59 ms	1880 KB	Output is correct
3	Correct	53 ms	1884 KB	Output is correct
4	Incorrect	70 ms	2132 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	66 ms	2132 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	301 ms	8280 KB	Output is correct
2	Correct	312 ms	8284 KB	Output is correct
3	Correct	321 ms	8536 KB	Output is correct
4	Incorrect	321 ms	8532 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #13
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	310 ms	8284 KB	Output is correct
2	Incorrect	301 ms	8804 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	346 ms	9820 KB	Output is correct
2	Correct	366 ms	9820 KB	Output is correct
3	Correct	369 ms	9816 KB	Output is correct
4	Incorrect	392 ms	10360 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	413 ms	9820 KB	Output is correct
2	Incorrect	374 ms	10624 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	409 ms	11356 KB	Output is correct
2	Correct	422 ms	11356 KB	Output is correct
3	Correct	431 ms	11356 KB	Output is correct
4	Incorrect	468 ms	12168 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	437 ms	11352 KB	Output is correct
2	Incorrect	425 ms	12372 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	457 ms	12892 KB	Output is correct
2	Correct	550 ms	12892 KB	Output is correct
3	Correct	491 ms	12892 KB	Output is correct
4	Incorrect	548 ms	14164 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	497 ms	12888 KB	Output is correct
2	Incorrect	488 ms	14008 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	583 ms	15960 KB	Output is correct
2	Correct	676 ms	15964 KB	Output is correct
3	Correct	607 ms	15960 KB	Output is correct
4	Incorrect	639 ms	17232 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	697 ms	15960 KB	Output is correct
2	Incorrect	624 ms	17324 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Submission #1042246

Compilation message