답안 #1079726

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1079726	2024-08-28T23:15:28 Z	EmmaXII	Mobile (BOI12_mobile)	C++17	65 / 100	283 ms	35168 KB

mobile

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

typedef long long ll;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vll = vector<ll>;
using vvll = vector<vector<ll>>;

#define all(x) x.begin(), x.end()


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

	int N;
	ll L;
	cin >> N >> L;

	vector<ll> X(N);
	vector<ll> Y(N);
	for (int i=0;i<N;i++) cin >> X[i] >> Y[i];

	auto get_hw = [&](double y, double r) {
		if (abs(y) > r) return -1.0;
		return sqrt((r-y) * (r+y));
	};

	auto can_do = [&](double R) {
		double progress = 0.;
		for (int i=0;i<N;i++) {
			double hw = get_hw((double)Y[i], R);
			if (hw < 0) continue;

			double l = (double)X[i] - hw;
			double r = (double)X[i] + hw;
			if (l <= progress + 1e-6) progress = max(progress, r);
			if (progress >= (double)L) return true;
		}

		return false;
	};

	double lo = 0;
	double hi = L + abs(X[0]) + abs(Y[0]);

	while (hi - lo > 1e-4) {
		double mid = (lo + hi) / 2;
		if (can_do(mid)) hi = mid;
		else lo = mid;
	}
	cout << setprecision(10);
	cout << lo << endl;

	return 0;
}

Subtask #1
4.0 / 4.0

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

Subtask #2
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	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct

Subtask #3
4.0 / 4.0

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

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	348 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	1 ms	576 KB	Output is correct
4	Correct	1 ms	608 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	604 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	344 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	600 KB	Output is correct
2	Correct	2 ms	604 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	348 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	2396 KB	Output is correct
2	Correct	14 ms	2652 KB	Output is correct
3	Correct	9 ms	1884 KB	Output is correct
4	Correct	15 ms	2652 KB	Output is correct
5	Correct	6 ms	1628 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	2396 KB	Output is correct
2	Correct	11 ms	2152 KB	Output is correct
3	Correct	13 ms	2652 KB	Output is correct
4	Correct	15 ms	2908 KB	Output is correct
5	Correct	16 ms	3284 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	19 ms	2396 KB	Output is correct
2	Correct	15 ms	2908 KB	Output is correct
3	Correct	12 ms	2652 KB	Output is correct
4	Correct	20 ms	3972 KB	Output is correct
5	Correct	13 ms	2648 KB	Output is correct

Subtask #10
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	21 ms	3420 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	24 ms	3564 KB	Output is correct
2	Correct	23 ms	3416 KB	Output is correct
3	Correct	16 ms	2908 KB	Output is correct
4	Correct	22 ms	3940 KB	Output is correct
5	Correct	18 ms	3304 KB	Output is correct

Subtask #12
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	117 ms	12368 KB	Output is correct
2	Incorrect	94 ms	15828 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	109 ms	16464 KB	Output is correct
2	Correct	171 ms	14784 KB	Output is correct
3	Correct	81 ms	13904 KB	Output is correct
4	Correct	96 ms	17492 KB	Output is correct
5	Correct	82 ms	15436 KB	Output is correct

Subtask #14
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	131 ms	15184 KB	Output is correct
2	Incorrect	125 ms	19024 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	128 ms	19540 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	155 ms	17232 KB	Output is correct
2	Incorrect	141 ms	22352 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	159 ms	22552 KB	Output is correct
2	Correct	218 ms	20564 KB	Output is correct
3	Correct	103 ms	19596 KB	Output is correct
4	Correct	176 ms	24588 KB	Output is correct
5	Correct	120 ms	21328 KB	Output is correct

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	189 ms	19900 KB	Output is correct
2	Incorrect	156 ms	25168 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	173 ms	25940 KB	Output is correct
2	Correct	231 ms	23324 KB	Output is correct
3	Correct	123 ms	22352 KB	Output is correct
4	Correct	160 ms	28200 KB	Output is correct
5	Correct	140 ms	24364 KB	Output is correct

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	219 ms	24660 KB	Output is correct
2	Incorrect	217 ms	31572 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	224 ms	32356 KB	Output is correct
2	Correct	283 ms	29264 KB	Output is correct
3	Correct	165 ms	28248 KB	Output is correct
4	Correct	205 ms	35168 KB	Output is correct
5	Correct	165 ms	30800 KB	Output is correct

답안 #1079726

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