답안 #702626

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
702626	2023-02-24T15:33:08 Z	nguyennehehe	Mobile (BOI12_mobile)	C++14	100 / 100	755 ms	21932 KB

mobile

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

const int INF = 1e9 + 7;

int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    
    int n, L; cin >> n >> L;
    vector<pair<int, int>> a(n);
    for (auto &x: a) cin >> x.first >> x.second;

    auto good = [&](double R) {
        double l = 0;
        for (auto i: a) {
            long long u, v; tie(u, v) = i;
            #define sqr(x) (x) * (x)
            if (sqr(R) - sqr(v) < 0) continue;
            double delta = sqrt(sqr(R) - sqr(v));
            double x1 = -delta + u, x2 = delta + u;
            if (x1 <= l) l = max(l, x2);
            // cout << fixed << setprecision(10) << x1 << ' ' << x2 << '\n';
        }
        return l >= L;
    };

    double l = -1, r = 1e9 + 1;
    for (int i = 1, ITER = 100; i <= ITER; ++i) {
        double m = l + (r - l) / 2;
        if (good(m)) r = m;
        else l = m;
    }
    cout << fixed << setprecision(9) << r;
}

Subtask #1
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	212 KB	Output is correct
2	Correct	212 KB	Output is correct
3	Correct	212 KB	Output is correct
4	Correct	212 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	2 ms	340 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	340 KB	Output is correct
2	Correct	3 ms	340 KB	Output is correct
3	Correct	3 ms	340 KB	Output is correct
4	Correct	2 ms	340 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	340 KB	Output is correct
2	Correct	4 ms	340 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	4 ms	340 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	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	3 ms	340 KB	Output is correct
5	Correct	2 ms	340 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	57 ms	852 KB	Output is correct
2	Correct	35 ms	852 KB	Output is correct
3	Correct	21 ms	724 KB	Output is correct
4	Correct	24 ms	852 KB	Output is correct
5	Correct	14 ms	724 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	852 KB	Output is correct
2	Correct	22 ms	852 KB	Output is correct
3	Correct	25 ms	852 KB	Output is correct
4	Correct	27 ms	852 KB	Output is correct
5	Correct	40 ms	980 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	42 ms	980 KB	Output is correct
2	Correct	35 ms	852 KB	Output is correct
3	Correct	32 ms	980 KB	Output is correct
4	Correct	32 ms	1108 KB	Output is correct
5	Correct	26 ms	980 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	45 ms	1108 KB	Output is correct
2	Correct	47 ms	1108 KB	Output is correct
3	Correct	38 ms	1108 KB	Output is correct
4	Correct	33 ms	1108 KB	Output is correct
5	Correct	30 ms	1108 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	44 ms	1108 KB	Output is correct
2	Correct	53 ms	1108 KB	Output is correct
3	Correct	38 ms	1108 KB	Output is correct
4	Correct	33 ms	1108 KB	Output is correct
5	Correct	30 ms	1108 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	203 ms	4180 KB	Output is correct
2	Correct	230 ms	4180 KB	Output is correct
3	Correct	219 ms	4180 KB	Output is correct
4	Correct	165 ms	4164 KB	Output is correct
5	Correct	150 ms	4180 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	219 ms	4180 KB	Output is correct
2	Correct	461 ms	4180 KB	Output is correct
3	Correct	178 ms	4180 KB	Output is correct
4	Correct	153 ms	4180 KB	Output is correct
5	Correct	156 ms	4180 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	236 ms	4948 KB	Output is correct
2	Correct	282 ms	7560 KB	Output is correct
3	Correct	262 ms	7440 KB	Output is correct
4	Correct	197 ms	7436 KB	Output is correct
5	Correct	180 ms	7372 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	261 ms	4948 KB	Output is correct
2	Correct	526 ms	7348 KB	Output is correct
3	Correct	223 ms	7388 KB	Output is correct
4	Correct	189 ms	7364 KB	Output is correct
5	Correct	227 ms	13696 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	269 ms	5716 KB	Output is correct
2	Correct	309 ms	8200 KB	Output is correct
3	Correct	307 ms	8216 KB	Output is correct
4	Correct	224 ms	8212 KB	Output is correct
5	Correct	216 ms	14736 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	310 ms	5716 KB	Output is correct
2	Correct	570 ms	8012 KB	Output is correct
3	Correct	256 ms	7876 KB	Output is correct
4	Correct	221 ms	7936 KB	Output is correct
5	Correct	211 ms	7792 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	311 ms	6484 KB	Output is correct
2	Correct	349 ms	8524 KB	Output is correct
3	Correct	347 ms	8616 KB	Output is correct
4	Correct	266 ms	8408 KB	Output is correct
5	Correct	237 ms	8400 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	362 ms	6484 KB	Output is correct
2	Correct	620 ms	8464 KB	Output is correct
3	Correct	309 ms	16044 KB	Output is correct
4	Correct	257 ms	21932 KB	Output is correct
5	Correct	253 ms	18092 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	393 ms	8148 KB	Output is correct
2	Correct	440 ms	9916 KB	Output is correct
3	Correct	437 ms	9840 KB	Output is correct
4	Correct	316 ms	11912 KB	Output is correct
5	Correct	304 ms	9792 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	459 ms	8148 KB	Output is correct
2	Correct	755 ms	9752 KB	Output is correct
3	Correct	382 ms	9400 KB	Output is correct
4	Correct	317 ms	10664 KB	Output is correct
5	Correct	305 ms	9356 KB	Output is correct

답안 #702626

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