Submission #88197

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
88197	2018-12-04T10:28:58 Z	JustInCase	Mobile (BOI12_mobile)	C++17	95 / 100	861 ms	132096 KB

mobile

#include <bits/stdc++.h>

const int32_t MAX_N = 1e6;
const double EPS = 1e-6;

int32_t n, l;
std::pair< int32_t, int32_t > points[MAX_N + 5];

bool Check(double r) {
	std::vector< std::pair< double, bool > > events(2 * n);

	double curr = 0;
	for(int32_t i = 0; i < n; i++) {
		if(r * r < (int64_t) points[i].second * points[i].second) {
			continue;
		}

		double x1 = points[i].first - sqrt(r * r - (int64_t) points[i].second * points[i].second);
		double x2 = points[i].first + sqrt(r * r - (int64_t) points[i].second * points[i].second);

		if(!(x1 > curr)) {
			curr = std::max(curr, x2);
		}
	}

	if(!(curr < l)) {
		return true;
	}
	else {
		return false;
	}
}

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

	std::cin >> n >> l;

	for(int32_t i = 0; i < n; i++) {
		std::cin >> points[i].first >> points[i].second;
	}

	int64_t low = 1, high = 1e15;
	double ans;
	while(low <= high) {
		int64_t mid = (low + high) / 2;

		if(Check(mid / 10000.0)) {
			ans = mid / 10000.0;
			high = mid - 1;
		}
		else {
			low = mid + 1;
		}
	}

	std::cout << std::fixed << std::setprecision(7);
	std::cout << ans << '\n';
}

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	620 KB	Output is correct
4	Correct	2 ms	620 KB	Output is correct

Subtask #2
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	620 KB	Output is correct
2	Correct	2 ms	620 KB	Output is correct
3	Correct	2 ms	620 KB	Output is correct
4	Correct	2 ms	620 KB	Output is correct

Subtask #3
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	796 KB	Output is correct
2	Correct	4 ms	796 KB	Output is correct
3	Correct	3 ms	796 KB	Output is correct
4	Correct	4 ms	820 KB	Output is correct

Subtask #4
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	984 KB	Output is correct
2	Correct	5 ms	1028 KB	Output is correct
3	Correct	5 ms	1096 KB	Output is correct
4	Correct	5 ms	1136 KB	Output is correct

Subtask #5
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	1208 KB	Output is correct
2	Correct	5 ms	1248 KB	Output is correct
3	Correct	5 ms	1444 KB	Output is correct
4	Correct	5 ms	1444 KB	Output is correct

Subtask #6
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	1444 KB	Output is correct
2	Correct	5 ms	1444 KB	Output is correct
3	Correct	5 ms	1444 KB	Output is correct
4	Correct	5 ms	1444 KB	Output is correct
5	Correct	5 ms	1444 KB	Output is correct

Subtask #7
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	51 ms	4748 KB	Output is correct
2	Correct	50 ms	5788 KB	Output is correct
3	Correct	33 ms	5788 KB	Output is correct
4	Correct	43 ms	5788 KB	Output is correct
5	Correct	27 ms	5788 KB	Output is correct

Subtask #8
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	44 ms	5964 KB	Output is correct
2	Correct	40 ms	5964 KB	Output is correct
3	Correct	46 ms	6212 KB	Output is correct
4	Correct	46 ms	6212 KB	Output is correct
5	Correct	51 ms	6356 KB	Output is correct

Subtask #9
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	52 ms	6408 KB	Output is correct
2	Correct	51 ms	6408 KB	Output is correct
3	Correct	47 ms	6408 KB	Output is correct
4	Correct	55 ms	6812 KB	Output is correct
5	Correct	48 ms	6812 KB	Output is correct

Subtask #10
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	63 ms	6812 KB	Output is correct
2	Correct	61 ms	8204 KB	Output is correct
3	Correct	55 ms	9228 KB	Output is correct
4	Correct	59 ms	11224 KB	Output is correct
5	Correct	55 ms	11232 KB	Output is correct

Subtask #11
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	61 ms	11232 KB	Output is correct
2	Correct	61 ms	11232 KB	Output is correct
3	Correct	54 ms	11232 KB	Output is correct
4	Correct	58 ms	11336 KB	Output is correct
5	Correct	54 ms	11784 KB	Output is correct

Subtask #12
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	361 ms	27844 KB	Output is correct
2	Correct	389 ms	28840 KB	Output is correct
3	Correct	365 ms	28840 KB	Output is correct
4	Correct	374 ms	28860 KB	Output is correct
5	Correct	344 ms	28860 KB	Output is correct

Subtask #13
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	392 ms	28860 KB	Output is correct
2	Correct	416 ms	28860 KB	Output is correct
3	Correct	348 ms	28892 KB	Output is correct
4	Correct	334 ms	28892 KB	Output is correct
5	Correct	320 ms	28892 KB	Output is correct

Subtask #14
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	465 ms	32776 KB	Output is correct
2	Correct	508 ms	34044 KB	Output is correct
3	Correct	506 ms	34044 KB	Output is correct
4	Correct	453 ms	35720 KB	Output is correct
5	Correct	434 ms	35736 KB	Output is correct

Subtask #15
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	453 ms	35736 KB	Output is correct
2	Correct	515 ms	35736 KB	Output is correct
3	Correct	421 ms	35908 KB	Output is correct
4	Correct	412 ms	35908 KB	Output is correct
5	Correct	422 ms	35908 KB	Output is correct

Subtask #16
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	529 ms	39692 KB	Output is correct
2	Correct	546 ms	39692 KB	Output is correct
3	Correct	534 ms	39692 KB	Output is correct
4	Correct	538 ms	39692 KB	Output is correct
5	Correct	545 ms	39692 KB	Output is correct

Subtask #17
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	578 ms	39692 KB	Output is correct
2	Correct	635 ms	39692 KB	Output is correct
3	Correct	549 ms	39692 KB	Output is correct
4	Correct	542 ms	39692 KB	Output is correct
5	Correct	537 ms	39804 KB	Output is correct

Subtask #18
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	596 ms	44252 KB	Output is correct
2	Correct	647 ms	44308 KB	Output is correct
3	Correct	632 ms	44308 KB	Output is correct
4	Correct	612 ms	44340 KB	Output is correct
5	Correct	585 ms	44404 KB	Output is correct

Subtask #19
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	659 ms	44404 KB	Output is correct
2	Correct	703 ms	44404 KB	Output is correct
3	Correct	628 ms	44404 KB	Output is correct
4	Correct	641 ms	44424 KB	Output is correct
5	Correct	606 ms	44424 KB	Output is correct

Subtask #20
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	794 ms	52160 KB	Output is correct
2	Correct	828 ms	67808 KB	Output is correct
3	Correct	832 ms	82292 KB	Output is correct
4	Correct	787 ms	101592 KB	Output is correct
5	Correct	710 ms	114996 KB	Output is correct

Subtask #21
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	755 ms	115052 KB	Output is correct
2	Correct	861 ms	128424 KB	Output is correct
3	Runtime error	746 ms	132096 KB	Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
4	Halted	0 ms	0 KB	-

Submission #88197

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