답안 #1093833

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1093833	2024-09-27T15:55:11 Z	damamila	Mobile (BOI12_mobile)	C++14	0 / 100	597 ms	24660 KB

mobile

#include <bits/stdc++.h>

using namespace std;

//~ #define int long long

int n;
double l;
vector<pair<int, int>> points;

pair<double, double> circle_intersection(int i, double r) {
	auto [x, y] = points[i];
	double r2 = r*r;
	double y2 = y*y;
	double tmp = sqrt(r2-y2);
	double x1 = x-tmp;
	double x2 = x+tmp;
	if (x2 < x1) swap(x1, x2);
	return {x1, x2};
}

void solve() {
	double ub = 1e18, lb = 0;
	double m;
	while (lb+0.00001 < ub) {
		m = (lb+ub)/2;
		double reach = 0;
		bool ja = 1;
		for (int i = 0; i < n; i++) {
			auto [x1, x2] = circle_intersection(i, m);
			if (reach+0.0000001 < x1) ja = 0;
			reach = max(reach, x2);
		}
		if (reach+0.0000001 < l) ja = 0;
		if (ja) {
			ub = m;
		} else {
			lb = m+0.00001;
		}
	}
	cout << ub << endl;
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);  
	cin >> n >> l;
	cout << fixed << setprecision(6);
	points = vector<pair<int, int>> (n);
	for (int i = 0; i < n; i++) {
		cin >> points[i].first >> points[i].second;
		points[i].second = abs(points[i].second);
	}
	sort(points.begin(), points.end());
	solve();
}

Compilation message

mobile.cpp: In function 'std::pair<double, double> circle_intersection(int, double)':
mobile.cpp:12:7: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   12 |  auto [x, y] = points[i];
      |       ^
mobile.cpp: In function 'void solve()':
mobile.cpp:30:9: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |    auto [x1, x2] = circle_intersection(i, m);
      |         ^

Subtask #1
0 / 4.0

#	결과	메모리	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Incorrect	344 KB	Output isn't correct
4	Halted	0 KB	-

Subtask #2
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	Incorrect	348 KB	Output isn't correct
5	Halted	0 KB	-

Subtask #3
0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	2 ms	344 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #4
0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	3 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	344 KB	Output is correct
2	Correct	4 ms	348 KB	Output is correct
3	Incorrect	3 ms	344 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #6
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	3 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #7
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	43 ms	1628 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #8
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	35 ms	1628 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #9
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	1624 KB	Output is correct
2	Incorrect	33 ms	2252 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	45 ms	2772 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	2644 KB	Output is correct
2	Incorrect	41 ms	2652 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	197 ms	8648 KB	Output is correct
2	Correct	216 ms	12068 KB	Output is correct
3	Correct	213 ms	11344 KB	Output is correct
4	Incorrect	371 ms	13824 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #13
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	212 ms	12412 KB	Output is correct
2	Incorrect	322 ms	10748 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	231 ms	10132 KB	Output is correct
2	Incorrect	258 ms	14420 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	255 ms	14928 KB	Output is correct
2	Incorrect	378 ms	12880 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	286 ms	11856 KB	Output is correct
2	Incorrect	303 ms	16724 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	296 ms	17304 KB	Output is correct
2	Incorrect	435 ms	14928 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	311 ms	13628 KB	Output is correct
2	Incorrect	330 ms	19024 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	374 ms	19796 KB	Output is correct
2	Incorrect	501 ms	17236 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	378 ms	16956 KB	Output is correct
2	Incorrect	418 ms	23744 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	420 ms	24660 KB	Output is correct
2	Incorrect	597 ms	21332 KB	Output isn't correct
3	Halted	0 ms	0 KB	-