Submission #838467

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
838467	2023-08-27T06:47:38 Z	fanwen	Mobile (BOI12_mobile)	C++17	100 / 100	426 ms	27620 KB

mobile

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e6 + 5;

int N, L;
pair <int, int> p[MAXN];

void you_make_it(void) {
	cin >> N >> L;
	for (int i = 0; i < N; ++i) cin >> p[i].first >> p[i].second;

	double l = 0, r = 1.5e9;
	while(r - l > 1e-6) {
		double mid = (l + r) / 2.0, res = 0;
		for (int i = 0; i < N; ++i) {
			double dist = sqrt(mid * mid - 1LL * p[i].second * p[i].second);
			double a = p[i].first - dist, b = p[i].first + dist;
			if(a <= res) res = max(res, b);
		}
		if(res <= L) l = mid;
		else r = mid;
	}
	cout << fixed << setprecision(6) << l;
}

signed main() {

#ifdef LOCAL
    freopen("TASK.inp", "r", stdin);
    freopen("TASK.out", "w", stdout);
#endif
    auto start_time = chrono::steady_clock::now();

    cin.tie(0), cout.tie(0) -> sync_with_stdio(0);

    you_make_it();

    auto end_time = chrono::steady_clock::now();

    cerr << "\nExecution time : " << chrono::duration_cast <chrono::milliseconds> (end_time - start_time).count() << "[ms]" << endl;

    return (0 ^ 0);
}

// Dream it. Wish it. Do it.

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	212 KB	Output is correct

Subtask #2
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	212 KB	Output is correct

Subtask #3
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct

Subtask #4
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	340 KB	Output is correct
2	Correct	2 ms	340 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	2 ms	340 KB	Output is correct

Subtask #5
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	340 KB	Output is correct
2	Correct	2 ms	404 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	2 ms	340 KB	Output is correct

Subtask #6
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	464 KB	Output is correct
2	Correct	2 ms	340 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	2 ms	340 KB	Output is correct
5	Correct	2 ms	340 KB	Output is correct

Subtask #7
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	1620 KB	Output is correct
2	Correct	21 ms	2004 KB	Output is correct
3	Correct	15 ms	1364 KB	Output is correct
4	Correct	26 ms	2004 KB	Output is correct
5	Correct	14 ms	1120 KB	Output is correct

Subtask #8
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	25 ms	1620 KB	Output is correct
2	Correct	24 ms	1688 KB	Output is correct
3	Correct	26 ms	1876 KB	Output is correct
4	Correct	27 ms	2132 KB	Output is correct
5	Correct	34 ms	2508 KB	Output is correct

Subtask #9
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	21 ms	1620 KB	Output is correct
2	Correct	26 ms	2176 KB	Output is correct
3	Correct	23 ms	1856 KB	Output is correct
4	Correct	42 ms	3040 KB	Output is correct
5	Correct	28 ms	1876 KB	Output is correct

Subtask #10
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	29 ms	2532 KB	Output is correct
2	Correct	27 ms	2388 KB	Output is correct
3	Correct	27 ms	2132 KB	Output is correct
4	Correct	38 ms	3020 KB	Output is correct
5	Correct	37 ms	2348 KB	Output is correct

Subtask #11
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	27 ms	2516 KB	Output is correct
2	Correct	28 ms	2380 KB	Output is correct
3	Correct	27 ms	2036 KB	Output is correct
4	Correct	39 ms	3020 KB	Output is correct
5	Correct	39 ms	2376 KB	Output is correct

Subtask #12
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	126 ms	8448 KB	Output is correct
2	Correct	141 ms	11944 KB	Output is correct
3	Correct	136 ms	11340 KB	Output is correct
4	Correct	185 ms	13772 KB	Output is correct
5	Correct	171 ms	11056 KB	Output is correct

Subtask #13
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	143 ms	12432 KB	Output is correct
2	Correct	244 ms	10740 KB	Output is correct
3	Correct	132 ms	9976 KB	Output is correct
4	Correct	180 ms	13516 KB	Output is correct
5	Correct	164 ms	11536 KB	Output is correct

Subtask #14
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	144 ms	10092 KB	Output is correct
2	Correct	166 ms	14220 KB	Output is correct
3	Correct	162 ms	13656 KB	Output is correct
4	Correct	223 ms	16912 KB	Output is correct
5	Correct	198 ms	13000 KB	Output is correct

Subtask #15
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	173 ms	15000 KB	Output is correct
2	Correct	277 ms	12828 KB	Output is correct
3	Correct	164 ms	11852 KB	Output is correct
4	Correct	222 ms	16744 KB	Output is correct
5	Correct	201 ms	13820 KB	Output is correct

Subtask #16
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	183 ms	11864 KB	Output is correct
2	Correct	203 ms	16588 KB	Output is correct
3	Correct	211 ms	15964 KB	Output is correct
4	Correct	263 ms	19340 KB	Output is correct
5	Correct	247 ms	14836 KB	Output is correct

Subtask #17
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	197 ms	17236 KB	Output is correct
2	Correct	316 ms	15044 KB	Output is correct
3	Correct	190 ms	14184 KB	Output is correct
4	Correct	255 ms	19276 KB	Output is correct
5	Correct	234 ms	15932 KB	Output is correct

Subtask #18
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	192 ms	13392 KB	Output is correct
2	Correct	223 ms	18992 KB	Output is correct
3	Correct	213 ms	18124 KB	Output is correct
4	Correct	311 ms	22240 KB	Output is correct
5	Correct	265 ms	17736 KB	Output is correct

Subtask #19
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	227 ms	19772 KB	Output is correct
2	Correct	352 ms	17152 KB	Output is correct
3	Correct	213 ms	16032 KB	Output is correct
4	Correct	305 ms	22124 KB	Output is correct
5	Correct	326 ms	18068 KB	Output is correct

Subtask #20
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	241 ms	16832 KB	Output is correct
2	Correct	289 ms	23592 KB	Output is correct
3	Correct	267 ms	22612 KB	Output is correct
4	Correct	364 ms	27280 KB	Output is correct
5	Correct	370 ms	21696 KB	Output is correct

Subtask #21
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	285 ms	24796 KB	Output is correct
2	Correct	426 ms	21352 KB	Output is correct
3	Correct	281 ms	20432 KB	Output is correct
4	Correct	373 ms	27620 KB	Output is correct
5	Correct	331 ms	22892 KB	Output is correct

Submission #838467

Compilation message