답안 #979720

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
979720	2024-05-11T10:20:51 Z	12345678	Mobile (BOI12_mobile)	C++17	100 / 100	552 ms	35456 KB

mobile

#include <bits/stdc++.h>

using namespace std;

const int nx=1e6+5;

int n, L;
pair<double, double> p[nx];

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>L;
    for (int i=1; i<=n; i++) cin>>p[i].first>>p[i].second;
    double l=0, r=2e9;
    while (r-l>1e-4)
    {
        double md=(l+r)/2, mx=0;
        for (int i=1; i<=n; i++)
        {
            double x=md*md-p[i].second*p[i].second;
            if (x<0) continue;
            x=sqrt(x);
            if (p[i].first-x<=mx) mx=max(mx, p[i].first+x);
        }
        if (mx>=L) r=md;
        else l=md;
    }
    cout<<fixed<<setprecision(4)<<l;
}

Subtask #1
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	348 KB	Output is correct
2	Correct	464 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 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	1 ms	348 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	500 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	348 KB	Output is correct
2	Correct	2 ms	528 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	512 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	536 KB	Output is correct
2	Correct	3 ms	472 KB	Output is correct
3	Correct	3 ms	348 KB	Output is correct
4	Correct	3 ms	604 KB	Output is correct

Subtask #5
4.0 / 4.0

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

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	476 KB	Output is correct
2	Correct	3 ms	604 KB	Output is correct
3	Correct	3 ms	348 KB	Output is correct
4	Correct	3 ms	604 KB	Output is correct
5	Correct	3 ms	476 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	39 ms	3332 KB	Output is correct
2	Correct	37 ms	3752 KB	Output is correct
3	Correct	24 ms	3156 KB	Output is correct
4	Correct	36 ms	3692 KB	Output is correct
5	Correct	21 ms	3084 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	35 ms	3412 KB	Output is correct
2	Correct	38 ms	3484 KB	Output is correct
3	Correct	46 ms	3676 KB	Output is correct
4	Correct	39 ms	3880 KB	Output is correct
5	Correct	59 ms	3956 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	49 ms	3164 KB	Output is correct
2	Correct	39 ms	3672 KB	Output is correct
3	Correct	37 ms	3420 KB	Output is correct
4	Correct	54 ms	4576 KB	Output is correct
5	Correct	39 ms	3440 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	48 ms	4196 KB	Output is correct
2	Correct	57 ms	3924 KB	Output is correct
3	Correct	43 ms	3664 KB	Output is correct
4	Correct	50 ms	4592 KB	Output is correct
5	Correct	53 ms	4068 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	53 ms	4080 KB	Output is correct
2	Correct	55 ms	4080 KB	Output is correct
3	Correct	48 ms	3908 KB	Output is correct
4	Correct	47 ms	4436 KB	Output is correct
5	Correct	46 ms	3956 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	224 ms	13036 KB	Output is correct
2	Correct	246 ms	16356 KB	Output is correct
3	Correct	258 ms	15956 KB	Output is correct
4	Correct	274 ms	18332 KB	Output is correct
5	Correct	243 ms	15444 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	257 ms	17012 KB	Output is correct
2	Correct	282 ms	15440 KB	Output is correct
3	Correct	226 ms	14680 KB	Output is correct
4	Correct	256 ms	18024 KB	Output is correct
5	Correct	254 ms	15952 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	268 ms	15984 KB	Output is correct
2	Correct	292 ms	19940 KB	Output is correct
3	Correct	292 ms	19580 KB	Output is correct
4	Correct	319 ms	22660 KB	Output is correct
5	Correct	283 ms	18812 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	290 ms	20588 KB	Output is correct
2	Correct	322 ms	18824 KB	Output is correct
3	Correct	263 ms	17724 KB	Output is correct
4	Correct	282 ms	22512 KB	Output is correct
5	Correct	276 ms	19432 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	329 ms	18988 KB	Output is correct
2	Correct	341 ms	24148 KB	Output is correct
3	Correct	340 ms	23024 KB	Output is correct
4	Correct	365 ms	26372 KB	Output is correct
5	Correct	303 ms	21980 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	345 ms	24452 KB	Output is correct
2	Correct	399 ms	22192 KB	Output is correct
3	Correct	341 ms	21324 KB	Output is correct
4	Correct	351 ms	26092 KB	Output is correct
5	Correct	362 ms	23024 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	364 ms	21740 KB	Output is correct
2	Correct	427 ms	27364 KB	Output is correct
3	Correct	411 ms	26624 KB	Output is correct
4	Correct	399 ms	30684 KB	Output is correct
5	Correct	372 ms	26356 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	394 ms	28004 KB	Output is correct
2	Correct	437 ms	25560 KB	Output is correct
3	Correct	417 ms	24304 KB	Output is correct
4	Correct	411 ms	30288 KB	Output is correct
5	Correct	385 ms	26708 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	479 ms	24660 KB	Output is correct
2	Correct	515 ms	31648 KB	Output is correct
3	Correct	534 ms	30660 KB	Output is correct
4	Correct	492 ms	35300 KB	Output is correct
5	Correct	488 ms	29564 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	515 ms	32492 KB	Output is correct
2	Correct	552 ms	29296 KB	Output is correct
3	Correct	500 ms	28284 KB	Output is correct
4	Correct	522 ms	35456 KB	Output is correct
5	Correct	491 ms	30736 KB	Output is correct

답안 #979720

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