답안 #738462

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
738462	2023-05-08T19:41:59 Z	LKR__enjoyer	Mobile (BOI12_mobile)	C++17	100 / 100	551 ms	12836 KB

mobile

#include <iostream>
#include<bits/stdc++.h>
#define pb push_back
#define f first
#define s second
typedef long long ll;
typedef long double ld;
using namespace std;
int n,l;
vector<pair<int,int>> pkt;
bool spr(long double rad);
long double bin(ld lo,ld hi)
{
    for(int i=0;i<40;i++)
    {
        ld mid=(lo+hi)/2; 
        if(spr(mid))hi=mid; else lo=mid;
    }
    return lo;
}

int main()
{  ios_base::sync_with_stdio(false);
 cin.tie(0);
    cin>>n>>l;
    for(int i=0;i<n;i++)
    {int a,b; cin>>a>>b;
    pkt.pb({a,b});    
    }
    cout<<fixed<<setprecision(4)<<bin(0,(ld)(2*l));
    
    return 0;
}
bool spr(ld rad){

ld curr_min=1.5e9+1,curr_max=-1.5e9-1;
for(int i=0;i<n;i++)
{   ld x=(ld)pkt[i].f,y=(ld)pkt[i].s;
    if(rad<abs(y))continue; 
    ld del=(ld)sqrt(rad*rad-y*y);
    ld a=x-del,b=x+del; 
    if(b<0)continue; 
if(curr_min==1.5e9+1&&curr_max==-1.5e9-1){curr_min=a; curr_max=b; continue;}
if(a<=curr_max)curr_max=max(curr_max,b);
if(b>=curr_min)curr_min=min(curr_min,a);
}
if(curr_min>0||curr_max<(ld)l)return 0;
return 1;    
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 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 #2
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 #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Correct	3 ms	384 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	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 #6
5.0 / 5.0

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

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	36 ms	1492 KB	Output is correct
2	Correct	41 ms	1448 KB	Output is correct
3	Correct	23 ms	856 KB	Output is correct
4	Correct	21 ms	1492 KB	Output is correct
5	Correct	10 ms	856 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	20 ms	1480 KB	Output is correct
2	Correct	19 ms	1444 KB	Output is correct
3	Correct	21 ms	1492 KB	Output is correct
4	Correct	23 ms	1492 KB	Output is correct
5	Correct	24 ms	1492 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	42 ms	1464 KB	Output is correct
2	Correct	44 ms	1492 KB	Output is correct
3	Correct	35 ms	1492 KB	Output is correct
4	Correct	29 ms	1492 KB	Output is correct
5	Correct	21 ms	1468 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	53 ms	1468 KB	Output is correct
2	Correct	53 ms	1400 KB	Output is correct
3	Correct	42 ms	1408 KB	Output is correct
4	Correct	36 ms	1492 KB	Output is correct
5	Correct	26 ms	1492 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	1492 KB	Output is correct
2	Correct	53 ms	1480 KB	Output is correct
3	Correct	46 ms	1492 KB	Output is correct
4	Correct	33 ms	1376 KB	Output is correct
5	Correct	25 ms	1404 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	251 ms	4476 KB	Output is correct
2	Correct	269 ms	8324 KB	Output is correct
3	Correct	256 ms	8492 KB	Output is correct
4	Correct	148 ms	8296 KB	Output is correct
5	Correct	134 ms	8844 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	263 ms	4512 KB	Output is correct
2	Correct	259 ms	4916 KB	Output is correct
3	Correct	200 ms	4868 KB	Output is correct
4	Correct	138 ms	4928 KB	Output is correct
5	Correct	127 ms	4848 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	283 ms	8588 KB	Output is correct
2	Correct	332 ms	12488 KB	Output is correct
3	Correct	311 ms	12704 KB	Output is correct
4	Correct	193 ms	12244 KB	Output is correct
5	Correct	162 ms	12604 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	316 ms	8540 KB	Output is correct
2	Correct	319 ms	12568 KB	Output is correct
3	Correct	242 ms	12708 KB	Output is correct
4	Correct	179 ms	12096 KB	Output is correct
5	Correct	152 ms	12340 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	321 ms	8584 KB	Output is correct
2	Correct	368 ms	12340 KB	Output is correct
3	Correct	369 ms	12648 KB	Output is correct
4	Correct	214 ms	11228 KB	Output is correct
5	Correct	173 ms	12448 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	370 ms	9292 KB	Output is correct
2	Correct	342 ms	12544 KB	Output is correct
3	Correct	294 ms	12388 KB	Output is correct
4	Correct	209 ms	11756 KB	Output is correct
5	Correct	191 ms	11568 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	406 ms	9528 KB	Output is correct
2	Correct	431 ms	12184 KB	Output is correct
3	Correct	430 ms	12412 KB	Output is correct
4	Correct	235 ms	12332 KB	Output is correct
5	Correct	206 ms	11648 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	421 ms	9616 KB	Output is correct
2	Correct	426 ms	12604 KB	Output is correct
3	Correct	346 ms	12716 KB	Output is correct
4	Correct	242 ms	12836 KB	Output is correct
5	Correct	205 ms	12484 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	483 ms	9716 KB	Output is correct
2	Correct	551 ms	12688 KB	Output is correct
3	Correct	501 ms	12772 KB	Output is correct
4	Correct	290 ms	8880 KB	Output is correct
5	Correct	269 ms	12708 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	546 ms	8712 KB	Output is correct
2	Correct	458 ms	12716 KB	Output is correct
3	Correct	426 ms	12720 KB	Output is correct
4	Correct	285 ms	8780 KB	Output is correct
5	Correct	266 ms	12756 KB	Output is correct

답안 #738462

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