답안 #1093829

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1093829	2024-09-27T15:50:08 Z	damamila	Mobile (BOI12_mobile)	C++14	0 / 100	466 ms	23636 KB

mobile

#include <bits/stdc++.h>

using namespace std;

//~ #define int long long

int n, 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 = 1e9, 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;
	}
	solve();
}

Compilation message

mobile.cpp: In function 'std::pair<double, double> circle_intersection(int, double)':
mobile.cpp:11:7: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   11 |  auto [x, y] = points[i];
      |       ^
mobile.cpp: In function 'void solve()':
mobile.cpp:29:9: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   29 |    auto [x1, x2] = circle_intersection(i, m);
      |         ^

Subtask #1
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	Incorrect	1 ms	348 KB	Output isn't correct
4	Halted	0 ms	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	1 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #4
0 / 4.0

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

Subtask #6
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	2 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	35 ms	2060 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #8
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	32 ms	1700 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #9
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	24 ms	1624 KB	Output is correct
2	Incorrect	24 ms	2268 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	33 ms	2648 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	2644 KB	Output is correct
2	Incorrect	29 ms	2648 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	131 ms	7948 KB	Output is correct
2	Correct	145 ms	11856 KB	Output is correct
3	Correct	145 ms	11512 KB	Output is correct
4	Incorrect	312 ms	13904 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #13
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	159 ms	11024 KB	Output is correct
2	Incorrect	260 ms	10832 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	155 ms	9736 KB	Output is correct
2	Incorrect	182 ms	14340 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	179 ms	13144 KB	Output is correct
2	Incorrect	300 ms	13060 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	191 ms	10900 KB	Output is correct
2	Incorrect	206 ms	16532 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	211 ms	14928 KB	Output is correct
2	Incorrect	350 ms	14932 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	205 ms	12384 KB	Output is correct
2	Incorrect	238 ms	19028 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	229 ms	17236 KB	Output is correct
2	Incorrect	396 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	268 ms	15424 KB	Output is correct
2	Incorrect	281 ms	23636 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	294 ms	21072 KB	Output is correct
2	Incorrect	466 ms	21436 KB	Output isn't correct
3	Halted	0 ms	0 KB	-