답안 #941331

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
941331	2024-03-08T14:36:44 Z	Kavelmydex	Mobile (BOI12_mobile)	C++17	36 / 100	456 ms	18924 KB

mobile

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pi pair<int,int>
#define vi vector<int>
#define rep(i,x,n) for(int i=x; i<n; ++i)
#define For(i,n) rep(i,0,n)
#define pb push_back
#define endl "\n"
#define sp ' '
#define f first
#define s second
#define sz size()
#define all(x) (x).begin(),(x).end()

const int N = 3e5+10, OO = 1e18, mod = 1e9+7;
void tr(int a, int b){cout << a << sp << b << endl;}
void cmx(int &a, int b){a = max(a,b);}
void cmn(int &a, int b){a = min(a,b);}

vector <pi> v;
int n,L;
bool ok(double m){
    double mn = 2e9, mx = -2e9, z = 0;
    For(i,n){
        auto [x,y] = v[i];
        if(y*y > m*m) continue;
        double d = sqrt(m * m - y * y);
        if(x-d <= z){
            z = max(z,x+d);   
        }   
        if(x-d < mn) mn = x-d;
        if(mx < x+d) mx = x+d;   
    }
    return (mn <= 0 && L <= mx && z >= mx);
}
int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> L;
    For(i,n){
        int x,y; cin >> x >> y;
        v.pb({x,y});
    }
    double l = 0, r = 1e10;
    For(i,60){
        double m = (l+r)/2;
        if(ok(m)) r = m;
        else l = m;
    }
    cout << setprecision(10) << r << endl;
    return 0;
}

Subtask #1
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	504 KB	Output is correct
2	Correct	348 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	0 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	348 KB	Output is correct

Subtask #3
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	Incorrect	1 ms	348 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	600 KB	Output is correct
2	Correct	2 ms	604 KB	Output is correct
3	Correct	2 ms	604 KB	Output is correct
4	Correct	2 ms	604 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	604 KB	Output is correct
2	Correct	2 ms	604 KB	Output is correct
3	Correct	2 ms	604 KB	Output is correct
4	Correct	2 ms	600 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	604 KB	Output is correct
2	Correct	3 ms	604 KB	Output is correct
3	Correct	2 ms	604 KB	Output is correct
4	Correct	2 ms	604 KB	Output is correct
5	Correct	2 ms	600 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	2520 KB	Output is correct
2	Correct	26 ms	2412 KB	Output is correct
3	Correct	16 ms	1500 KB	Output is correct
4	Correct	22 ms	2572 KB	Output is correct
5	Correct	12 ms	1496 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	20 ms	2520 KB	Output is correct
2	Correct	22 ms	2520 KB	Output is correct
3	Correct	21 ms	2520 KB	Output is correct
4	Correct	22 ms	2644 KB	Output is correct
5	Correct	23 ms	2540 KB	Output is correct

Subtask #9
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	2520 KB	Output is correct
2	Correct	32 ms	2564 KB	Output is correct
3	Correct	32 ms	2520 KB	Output is correct
4	Incorrect	27 ms	2504 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	39 ms	2412 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	35 ms	2520 KB	Output is correct
2	Correct	34 ms	2520 KB	Output is correct
3	Correct	30 ms	2608 KB	Output is correct
4	Incorrect	28 ms	2520 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	175 ms	9184 KB	Output is correct
2	Incorrect	174 ms	8892 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #13
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	184 ms	9316 KB	Output is correct
2	Correct	269 ms	9668 KB	Output is correct
3	Correct	152 ms	9156 KB	Output is correct
4	Correct	128 ms	10704 KB	Output is correct
5	Incorrect	128 ms	8640 KB	Output isn't correct
6	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	201 ms	17800 KB	Output is correct
2	Incorrect	202 ms	17848 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	210 ms	18352 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	245 ms	18360 KB	Output is correct
2	Incorrect	234 ms	17592 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	246 ms	18872 KB	Output is correct
2	Correct	328 ms	18028 KB	Output is correct
3	Correct	208 ms	18484 KB	Output is correct
4	Correct	188 ms	17844 KB	Output is correct
5	Incorrect	174 ms	18228 KB	Output isn't correct
6	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	255 ms	18368 KB	Output is correct
2	Incorrect	278 ms	18924 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	286 ms	18364 KB	Output is correct
2	Incorrect	365 ms	17916 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	327 ms	18056 KB	Output is correct
2	Incorrect	380 ms	17844 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	343 ms	18072 KB	Output is correct
2	Correct	456 ms	18912 KB	Output is correct
3	Correct	292 ms	17844 KB	Output is correct
4	Correct	285 ms	18360 KB	Output is correct
5	Correct	266 ms	18360 KB	Output is correct

답안 #941331

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