답안 #88195 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
88195	2018-12-04T10:26:21 Z	JustInCase	Mobile (BOI12_mobile)	C++17	80 / 100	810 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 = 1e16;
	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

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	376 KB	Output is correct
2	Correct	2 ms	504 KB	Output is correct
3	Correct	2 ms	504 KB	Output is correct
4	Correct	2 ms	512 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	520 KB	Output is correct
2	Correct	2 ms	624 KB	Output is correct
3	Correct	2 ms	624 KB	Output is correct
4	Correct	2 ms	644 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	772 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	832 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	1080 KB	Output is correct
2	Correct	5 ms	1080 KB	Output is correct
3	Correct	5 ms	1108 KB	Output is correct
4	Correct	5 ms	1172 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	1224 KB	Output is correct
2	Correct	6 ms	1260 KB	Output is correct
3	Correct	5 ms	1328 KB	Output is correct
4	Correct	5 ms	1328 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	1384 KB	Output is correct
2	Correct	5 ms	1436 KB	Output is correct
3	Correct	5 ms	1460 KB	Output is correct
4	Correct	5 ms	1460 KB	Output is correct
5	Correct	5 ms	1460 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	53 ms	4704 KB	Output is correct
2	Correct	49 ms	4724 KB	Output is correct
3	Correct	33 ms	4724 KB	Output is correct
4	Correct	45 ms	4724 KB	Output is correct
5	Correct	29 ms	4724 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	45 ms	4848 KB	Output is correct
2	Correct	42 ms	4848 KB	Output is correct
3	Correct	49 ms	4976 KB	Output is correct
4	Correct	46 ms	4976 KB	Output is correct
5	Correct	53 ms	5196 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	54 ms	5232 KB	Output is correct
2	Correct	54 ms	5232 KB	Output is correct
3	Correct	49 ms	5232 KB	Output is correct
4	Correct	60 ms	5620 KB	Output is correct
5	Correct	50 ms	5620 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	64 ms	5672 KB	Output is correct
2	Correct	64 ms	7104 KB	Output is correct
3	Correct	57 ms	8112 KB	Output is correct
4	Correct	62 ms	10100 KB	Output is correct
5	Correct	59 ms	11472 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	67 ms	11472 KB	Output is correct
2	Correct	65 ms	11472 KB	Output is correct
3	Correct	60 ms	12344 KB	Output is correct
4	Correct	61 ms	13120 KB	Output is correct
5	Correct	57 ms	13200 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	393 ms	29624 KB	Output is correct
2	Correct	397 ms	31216 KB	Output is correct
3	Correct	406 ms	31216 KB	Output is correct
4	Correct	403 ms	31216 KB	Output is correct
5	Correct	403 ms	31216 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	444 ms	31216 KB	Output is correct
2	Correct	461 ms	31216 KB	Output is correct
3	Correct	390 ms	31216 KB	Output is correct
4	Correct	407 ms	31216 KB	Output is correct
5	Correct	400 ms	31216 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	511 ms	35028 KB	Output is correct
2	Correct	527 ms	44272 KB	Output is correct
3	Correct	537 ms	52968 KB	Output is correct
4	Correct	495 ms	53244 KB	Output is correct
5	Correct	501 ms	53248 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	542 ms	53312 KB	Output is correct
2	Correct	578 ms	53312 KB	Output is correct
3	Correct	493 ms	53312 KB	Output is correct
4	Correct	500 ms	53312 KB	Output is correct
5	Correct	487 ms	53312 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	588 ms	57160 KB	Output is correct
2	Correct	616 ms	57224 KB	Output is correct
3	Correct	608 ms	57224 KB	Output is correct
4	Correct	583 ms	57348 KB	Output is correct
5	Correct	557 ms	66288 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	596 ms	66288 KB	Output is correct
2	Correct	660 ms	75556 KB	Output is correct
3	Correct	562 ms	83972 KB	Output is correct
4	Correct	587 ms	97392 KB	Output is correct
5	Correct	543 ms	107536 KB	Output is correct

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	617 ms	112256 KB	Output is correct
2	Correct	673 ms	124708 KB	Output is correct
3	Runtime error	649 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	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Runtime error	613 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.
2	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Runtime error	750 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.
2	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Runtime error	810 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.
2	Halted	0 ms	0 KB	-

답안 #88195

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