답안 #639209

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
639209	2022-09-09T01:01:47 Z	Pietra	Mobile (BOI12_mobile)	C++14	70 / 100	1000 ms	16040 KB

mobile

#include<bits/stdc++.h>
#define int long long
using namespace std ;

const int maxn = 2e6 + 5 ;
const double inf = 2e9 + 5 ;

double n, l, x[maxn], y[maxn] ;

bool check(double r){

    double f = 0 ;

    for(int i = 1 ; i <= n ; i++){
        if(r < y[i]) continue ;
        double dx = sqrt(((r*r) - (y[i]*y[i]))) ;
        double ini = x[i] - dx, fim = x[i] + dx ;
        if(ini <= f) f = max(f, fim) ;
    }

    return (f >= l) ;
}

int32_t main(){

    cin >> n >> l ;

    for(int i = 1 ; i <= n ; i++) cin >> x[i] >> y[i] ;

    double ini = 0, fim = inf, mid ;
    
    int ct = 45 ; 
    
    while(ct--){
        mid = (ini + fim)/2 ;
        if(check(mid)) fim = mid ;
        else ini = mid ;
    }

    cout << fixed << setprecision(6) << fim << "\n" ;

}

Subtask #1
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 #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	3 ms	340 KB	Output is correct
2	Correct	2 ms	340 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	3 ms	340 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	388 KB	Output is correct
2	Correct	5 ms	344 KB	Output is correct
3	Correct	4 ms	340 KB	Output is correct
4	Correct	6 ms	340 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	340 KB	Output is correct
2	Correct	5 ms	376 KB	Output is correct
3	Correct	4 ms	340 KB	Output is correct
4	Correct	7 ms	340 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	340 KB	Output is correct
2	Correct	5 ms	340 KB	Output is correct
3	Correct	5 ms	336 KB	Output is correct
4	Correct	7 ms	340 KB	Output is correct
5	Correct	4 ms	340 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	81 ms	1468 KB	Output is correct
2	Correct	87 ms	1412 KB	Output is correct
3	Correct	51 ms	1132 KB	Output is correct
4	Correct	102 ms	1480 KB	Output is correct
5	Correct	39 ms	968 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	73 ms	1492 KB	Output is correct
2	Correct	77 ms	1392 KB	Output is correct
3	Correct	94 ms	1604 KB	Output is correct
4	Correct	114 ms	1436 KB	Output is correct
5	Correct	120 ms	1584 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	70 ms	1668 KB	Output is correct
2	Correct	86 ms	1500 KB	Output is correct
3	Correct	78 ms	1520 KB	Output is correct
4	Correct	150 ms	1916 KB	Output is correct
5	Correct	90 ms	1612 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	112 ms	1840 KB	Output is correct
2	Correct	105 ms	1792 KB	Output is correct
3	Correct	89 ms	1740 KB	Output is correct
4	Correct	152 ms	1832 KB	Output is correct
5	Correct	115 ms	1876 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	110 ms	1868 KB	Output is correct
2	Correct	107 ms	1864 KB	Output is correct
3	Correct	100 ms	1848 KB	Output is correct
4	Correct	149 ms	1864 KB	Output is correct
5	Correct	119 ms	1828 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	416 ms	8100 KB	Output is correct
2	Correct	549 ms	8024 KB	Output is correct
3	Correct	524 ms	8060 KB	Output is correct
4	Correct	728 ms	8268 KB	Output is correct
5	Correct	603 ms	8188 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	570 ms	8048 KB	Output is correct
2	Correct	559 ms	8124 KB	Output is correct
3	Correct	468 ms	8096 KB	Output is correct
4	Correct	715 ms	8124 KB	Output is correct
5	Correct	617 ms	8096 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	511 ms	9664 KB	Output is correct
2	Correct	675 ms	9664 KB	Output is correct
3	Correct	636 ms	9688 KB	Output is correct
4	Correct	898 ms	9620 KB	Output is correct
5	Correct	699 ms	9700 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	685 ms	9676 KB	Output is correct
2	Correct	664 ms	9728 KB	Output is correct
3	Correct	544 ms	9680 KB	Output is correct
4	Correct	899 ms	9620 KB	Output is correct
5	Correct	750 ms	9624 KB	Output is correct

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	583 ms	11256 KB	Output is correct
2	Correct	770 ms	11256 KB	Output is correct
3	Correct	738 ms	11412 KB	Output is correct
4	Execution timed out	1031 ms	11256 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	805 ms	11268 KB	Output is correct
2	Correct	775 ms	11276 KB	Output is correct
3	Correct	651 ms	11244 KB	Output is correct
4	Execution timed out	1026 ms	11252 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	662 ms	12816 KB	Output is correct
2	Correct	875 ms	12816 KB	Output is correct
3	Correct	854 ms	12716 KB	Output is correct
4	Execution timed out	1044 ms	12820 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	915 ms	12848 KB	Output is correct
2	Correct	857 ms	12856 KB	Output is correct
3	Correct	738 ms	12748 KB	Output is correct
4	Execution timed out	1093 ms	12716 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	835 ms	16024 KB	Output is correct
2	Execution timed out	1084 ms	16040 KB	Time limit exceeded
3	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Execution timed out	1083 ms	15964 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

답안 #639209

Compilation message