답안 #974144

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
974144	2024-05-02T23:12:37 Z	AksLolCoding	Mobile (BOI12_mobile)	C++17	80 / 100	1000 ms	31824 KB

mobile

#include <bits/stdc++.h>
using namespace std;

using ld = long double;
using ld2 = array<ld, 2>;

const ld diff = 1e-3;
int n;
ld h;
vector<ld2> pts;

ld2 range(ld dist, ld2& pt) {
	ld dx = sqrt(dist*dist - pt[1]*pt[1]);
	return {pt[0] - dx, pt[0] + dx};
}

bool check(ld dist) {
	ld left = 0;
	for (ld2& pt: pts) {
		ld2 r = range(dist, pt);
		if (r[0] <= left) left = max(left, r[1]);
	}
	return (left >= h);
}

int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin >> n >> h;
	pts.resize(n);
	for (auto& i: pts) cin >> i[0] >> i[1];

	// solve
	ld l = 0, r = 1.5e9, m;
	while (r - l > diff) {
		m = (r + l) / 2;
		if (check(m)) r = m;
		else l = m;
	}
	printf("%.3Lf\n", m);
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	1 ms	344 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	344 KB	Output is correct
2	Correct	2 ms	348 KB	Output is correct
3	Correct	2 ms	348 KB	Output is correct
4	Correct	2 ms	348 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	604 KB	Output is correct
2	Correct	3 ms	604 KB	Output is correct
3	Correct	4 ms	604 KB	Output is correct
4	Correct	5 ms	604 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	604 KB	Output is correct
2	Correct	3 ms	604 KB	Output is correct
3	Correct	3 ms	604 KB	Output is correct
4	Correct	5 ms	632 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	600 KB	Output is correct
2	Correct	3 ms	604 KB	Output is correct
3	Correct	3 ms	604 KB	Output is correct
4	Correct	5 ms	600 KB	Output is correct
5	Correct	4 ms	600 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	54 ms	2648 KB	Output is correct
2	Correct	40 ms	2652 KB	Output is correct
3	Correct	32 ms	2140 KB	Output is correct
4	Correct	69 ms	2648 KB	Output is correct
5	Correct	40 ms	1880 KB	Output is correct

Subtask #8
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	72 ms	2908 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	42 ms	3164 KB	Output is correct
2	Correct	46 ms	3040 KB	Output is correct
3	Correct	49 ms	2904 KB	Output is correct
4	Correct	103 ms	3568 KB	Output is correct
5	Correct	72 ms	3164 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	53 ms	3584 KB	Output is correct
2	Correct	51 ms	3416 KB	Output is correct
3	Correct	61 ms	3420 KB	Output is correct
4	Correct	103 ms	3588 KB	Output is correct
5	Correct	83 ms	3672 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	3416 KB	Output is correct
2	Correct	51 ms	3588 KB	Output is correct
3	Correct	59 ms	3420 KB	Output is correct
4	Correct	106 ms	3416 KB	Output is correct
5	Correct	95 ms	3584 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	246 ms	16116 KB	Output is correct
2	Correct	266 ms	16108 KB	Output is correct
3	Correct	262 ms	16112 KB	Output is correct
4	Correct	513 ms	15964 KB	Output is correct
5	Correct	438 ms	16216 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	284 ms	16112 KB	Output is correct
2	Correct	395 ms	16112 KB	Output is correct
3	Correct	297 ms	15964 KB	Output is correct
4	Correct	502 ms	15964 KB	Output is correct
5	Correct	455 ms	16112 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	294 ms	19288 KB	Output is correct
2	Correct	342 ms	19248 KB	Output is correct
3	Correct	313 ms	19032 KB	Output is correct
4	Correct	627 ms	19032 KB	Output is correct
5	Correct	519 ms	19036 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	327 ms	19292 KB	Output is correct
2	Correct	466 ms	19036 KB	Output is correct
3	Correct	370 ms	19288 KB	Output is correct
4	Correct	629 ms	19036 KB	Output is correct
5	Correct	539 ms	19248 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	350 ms	22608 KB	Output is correct
2	Correct	372 ms	22360 KB	Output is correct
3	Correct	371 ms	22360 KB	Output is correct
4	Correct	737 ms	22372 KB	Output is correct
5	Correct	606 ms	22372 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	380 ms	22368 KB	Output is correct
2	Correct	577 ms	22368 KB	Output is correct
3	Correct	443 ms	22364 KB	Output is correct
4	Correct	711 ms	22372 KB	Output is correct
5	Correct	622 ms	22616 KB	Output is correct

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	399 ms	25504 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	444 ms	25508 KB	Output is correct
2	Correct	617 ms	25680 KB	Output is correct
3	Correct	489 ms	25508 KB	Output is correct
4	Correct	841 ms	25512 KB	Output is correct
5	Correct	754 ms	25436 KB	Output is correct

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	509 ms	31760 KB	Output is correct
2	Correct	553 ms	31768 KB	Output is correct
3	Correct	535 ms	31576 KB	Output is correct
4	Execution timed out	1039 ms	31764 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	539 ms	31580 KB	Output is correct
2	Correct	780 ms	31764 KB	Output is correct
3	Correct	599 ms	31824 KB	Output is correct
4	Execution timed out	1043 ms	31768 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

답안 #974144

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