답안 #941376

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
941376	2024-03-08T16:18:47 Z	Kavelmydex	Mobile (BOI12_mobile)	C++17	36 / 100	477 ms	33348 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);}

double eps = 1e-9;
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 <= x+d){
            z = x+d;
        }   
        if(x-d < mn) mn = x-d;
        if(mx < x+d) mx = x+d;    
    }
    if(z >= L){
        assert(abs(z-mx) < 1);    
    }
    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	실행 시간	메모리	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	452 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	600 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	832 KB	Output is correct
3	Correct	1 ms	344 KB	Output is correct
4	Runtime error	1 ms	856 KB	Execution killed with signal 6
5	Halted	0 ms	0 KB	-

Subtask #4
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	3 ms	604 KB	Output is correct
4	Correct	2 ms	720 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	600 KB	Output is correct
4	Correct	2 ms	604 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	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
5	Correct	2 ms	604 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	40 ms	3032 KB	Output is correct
2	Correct	27 ms	3288 KB	Output is correct
3	Correct	21 ms	2012 KB	Output is correct
4	Correct	25 ms	3372 KB	Output is correct
5	Correct	13 ms	2008 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	3264 KB	Output is correct
2	Correct	21 ms	3028 KB	Output is correct
3	Correct	22 ms	3288 KB	Output is correct
4	Correct	25 ms	3284 KB	Output is correct
5	Correct	26 ms	3540 KB	Output is correct

Subtask #9
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	33 ms	3284 KB	Output is correct
2	Correct	34 ms	3288 KB	Output is correct
3	Correct	27 ms	3032 KB	Output is correct
4	Runtime error	24 ms	5576 KB	Execution killed with signal 6
5	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	40 ms	3468 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	43 ms	3664 KB	Output is correct
2	Correct	40 ms	3408 KB	Output is correct
3	Correct	35 ms	3284 KB	Output is correct
4	Runtime error	26 ms	5576 KB	Execution killed with signal 6
5	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	173 ms	10944 KB	Output is correct
2	Incorrect	173 ms	12784 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	13244 KB	Output is correct
2	Correct	290 ms	12216 KB	Output is correct
3	Correct	149 ms	11856 KB	Output is correct
4	Correct	130 ms	13748 KB	Output is correct
5	Runtime error	115 ms	20816 KB	Execution killed with signal 6
6	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	208 ms	20924 KB	Output is correct
2	Incorrect	223 ms	23428 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Incorrect	217 ms	22964 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	250 ms	20928 KB	Output is correct
2	Incorrect	275 ms	24328 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	275 ms	22708 KB	Output is correct
2	Correct	332 ms	22276 KB	Output is correct
3	Correct	225 ms	20920 KB	Output is correct
4	Correct	206 ms	23556 KB	Output is correct
5	Runtime error	176 ms	30120 KB	Execution killed with signal 6
6	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	286 ms	20916 KB	Output is correct
2	Incorrect	296 ms	22964 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	290 ms	22452 KB	Output is correct
2	Runtime error	250 ms	33348 KB	Execution killed with signal 6
3	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	344 ms	21024 KB	Output is correct
2	Incorrect	364 ms	24576 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	362 ms	25180 KB	Output is correct
2	Correct	477 ms	23724 KB	Output is correct
3	Correct	318 ms	23708 KB	Output is correct
4	Correct	282 ms	26548 KB	Output is correct
5	Correct	271 ms	24540 KB	Output is correct

답안 #941376

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