답안 #1031423

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1031423	2024-07-22T20:23:14 Z	vjudge1	Mobile (BOI12_mobile)	C++17	100 / 100	471 ms	35408 KB

mobile

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

#define int ll
#define vi vector<int>
#define ii pair<int,int>
#define x first
#define y second
#define fore(a, b, c) for(int a=b; a<c; ++a)
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define endl '\n'
#define dbg(x) cerr << #x << ": " << x << endl
#define raya cerr << "================" << endl;

double eps = 1e-4;

signed main(){

    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n, len;
    cin >> n >> len;

    vector<ii> p(n);
    fore(i, 0, n){
        cin >> p[i].x >> p[i].y;
    }

    double low = 0, high = 1e9+5;
    double ans = high;

    while((high - low) > eps){
        double mid = low + (high - low) / 2;
        
        double mx = 0;

        fore(i, 0, n){
            double delta = (2*p[i].x)*(2*p[i].x)-4*(p[i].x*p[i].x+p[i].y*p[i].y-mid*mid);
            double a = (2*p[i].x - sqrt(delta)) / 2;
            double b = (2*p[i].x + sqrt(delta)) / 2;
            
            if(a <= mx){
                mx = max(mx, b);
            }
        }

        if(mx >= len){
            ans = mid;
            high = mid-eps;
        } else {
            low = mid+eps;
        }

    }

    cout << fixed << setprecision(6) << ans;

}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	600 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct

Subtask #2
4.0 / 4.0

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

Subtask #4
4.0 / 4.0

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

Subtask #5
4.0 / 4.0

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

Subtask #6
5.0 / 5.0

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

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	33 ms	1624 KB	Output is correct
2	Correct	21 ms	1628 KB	Output is correct
3	Correct	15 ms	1116 KB	Output is correct
4	Correct	34 ms	1628 KB	Output is correct
5	Correct	21 ms	1116 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	27 ms	1628 KB	Output is correct
2	Correct	28 ms	1372 KB	Output is correct
3	Correct	33 ms	1628 KB	Output is correct
4	Correct	34 ms	1628 KB	Output is correct
5	Correct	39 ms	1628 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	1624 KB	Output is correct
2	Correct	22 ms	1624 KB	Output is correct
3	Correct	24 ms	1628 KB	Output is correct
4	Correct	48 ms	1884 KB	Output is correct
5	Correct	33 ms	1628 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	29 ms	1884 KB	Output is correct
2	Correct	25 ms	1880 KB	Output is correct
3	Correct	27 ms	1884 KB	Output is correct
4	Correct	48 ms	1884 KB	Output is correct
5	Correct	42 ms	1884 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	26 ms	1880 KB	Output is correct
2	Correct	26 ms	1884 KB	Output is correct
3	Correct	27 ms	1884 KB	Output is correct
4	Correct	50 ms	1884 KB	Output is correct
5	Correct	40 ms	1884 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	132 ms	8284 KB	Output is correct
2	Correct	135 ms	8284 KB	Output is correct
3	Correct	124 ms	8280 KB	Output is correct
4	Correct	232 ms	8280 KB	Output is correct
5	Correct	211 ms	8284 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	128 ms	8280 KB	Output is correct
2	Correct	238 ms	8284 KB	Output is correct
3	Correct	136 ms	8284 KB	Output is correct
4	Correct	259 ms	8280 KB	Output is correct
5	Correct	208 ms	8280 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	147 ms	9824 KB	Output is correct
2	Correct	153 ms	9816 KB	Output is correct
3	Correct	149 ms	9816 KB	Output is correct
4	Correct	301 ms	9816 KB	Output is correct
5	Correct	223 ms	9820 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	153 ms	10072 KB	Output is correct
2	Correct	296 ms	9820 KB	Output is correct
3	Correct	163 ms	9816 KB	Output is correct
4	Correct	280 ms	9820 KB	Output is correct
5	Correct	252 ms	9816 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	168 ms	11352 KB	Output is correct
2	Correct	171 ms	11356 KB	Output is correct
3	Correct	176 ms	11356 KB	Output is correct
4	Correct	333 ms	11356 KB	Output is correct
5	Correct	289 ms	20620 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	186 ms	11356 KB	Output is correct
2	Correct	324 ms	11356 KB	Output is correct
3	Correct	197 ms	11352 KB	Output is correct
4	Correct	298 ms	11356 KB	Output is correct
5	Correct	308 ms	21508 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	184 ms	12888 KB	Output is correct
2	Correct	207 ms	12888 KB	Output is correct
3	Correct	191 ms	12892 KB	Output is correct
4	Correct	366 ms	12892 KB	Output is correct
5	Correct	339 ms	24020 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	235 ms	12892 KB	Output is correct
2	Correct	366 ms	12888 KB	Output is correct
3	Correct	220 ms	12892 KB	Output is correct
4	Correct	348 ms	12892 KB	Output is correct
5	Correct	334 ms	24368 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	216 ms	15960 KB	Output is correct
2	Correct	248 ms	15964 KB	Output is correct
3	Correct	242 ms	15964 KB	Output is correct
4	Correct	471 ms	15964 KB	Output is correct
5	Correct	398 ms	29520 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	258 ms	15964 KB	Output is correct
2	Correct	426 ms	15964 KB	Output is correct
3	Correct	300 ms	28388 KB	Output is correct
4	Correct	458 ms	35408 KB	Output is correct
5	Correct	432 ms	30688 KB	Output is correct

답안 #1031423

Compilation message