답안 #639202

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
639202	2022-09-09T00:38:29 Z	Pietra	Mobile (BOI12_mobile)	C++14	80 / 100	1000 ms	16060 KB

mobile

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

const int maxn = 2e6 + 5 ;
const int inf = 2e10 + 5 ;

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

bool check(double r){

    double f = 0 ;

    for(int i = 1 ; i <= n ; i++){
        double dx = sqrt((r*r) - (y[i]*y[i])) ;
        double ini = x[i] - dx, fim = x[i] + dx ;
        if(ini <= f + 1e-9) f = max(f, fim) ;
    }

    return (f + 1e-9 >= l) ;
}

int32_t main(){

    cin >> n >> l ;

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

    double ini = 0, fim = inf*1.000, 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	실행 시간	메모리	Grader output
1	Correct	1 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 #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	352 KB	Output is correct
2	Correct	3 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	6 ms	340 KB	Output is correct
2	Correct	6 ms	384 KB	Output is correct
3	Correct	5 ms	340 KB	Output is correct
4	Correct	7 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	7 ms	392 KB	Output is correct
3	Correct	4 ms	340 KB	Output is correct
4	Correct	6 ms	340 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	340 KB	Output is correct
2	Correct	6 ms	340 KB	Output is correct
3	Correct	4 ms	340 KB	Output is correct
4	Correct	6 ms	340 KB	Output is correct
5	Correct	5 ms	368 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	80 ms	1464 KB	Output is correct
2	Correct	83 ms	1384 KB	Output is correct
3	Correct	52 ms	1108 KB	Output is correct
4	Correct	92 ms	1356 KB	Output is correct
5	Correct	42 ms	1020 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	77 ms	1520 KB	Output is correct
2	Correct	81 ms	1372 KB	Output is correct
3	Correct	104 ms	1608 KB	Output is correct
4	Correct	117 ms	1540 KB	Output is correct
5	Correct	110 ms	1588 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	71 ms	1660 KB	Output is correct
2	Correct	107 ms	1484 KB	Output is correct
3	Correct	90 ms	1508 KB	Output is correct
4	Correct	136 ms	1756 KB	Output is correct
5	Correct	86 ms	1584 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	112 ms	1752 KB	Output is correct
2	Correct	114 ms	1780 KB	Output is correct
3	Correct	105 ms	1748 KB	Output is correct
4	Correct	135 ms	1840 KB	Output is correct
5	Correct	114 ms	1836 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	118 ms	1748 KB	Output is correct
2	Correct	125 ms	1776 KB	Output is correct
3	Correct	96 ms	1796 KB	Output is correct
4	Correct	149 ms	1864 KB	Output is correct
5	Correct	112 ms	1740 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	434 ms	8128 KB	Output is correct
2	Correct	593 ms	8208 KB	Output is correct
3	Correct	544 ms	8048 KB	Output is correct
4	Correct	681 ms	8112 KB	Output is correct
5	Correct	562 ms	8124 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	594 ms	8012 KB	Output is correct
2	Correct	614 ms	8140 KB	Output is correct
3	Correct	502 ms	8064 KB	Output is correct
4	Correct	670 ms	8120 KB	Output is correct
5	Correct	575 ms	8120 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	558 ms	9600 KB	Output is correct
2	Correct	705 ms	9688 KB	Output is correct
3	Correct	676 ms	10008 KB	Output is correct
4	Correct	853 ms	9696 KB	Output is correct
5	Correct	671 ms	9676 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	694 ms	9612 KB	Output is correct
2	Correct	733 ms	9668 KB	Output is correct
3	Correct	579 ms	9748 KB	Output is correct
4	Correct	850 ms	9708 KB	Output is correct
5	Correct	690 ms	9696 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	595 ms	11212 KB	Output is correct
2	Correct	822 ms	11148 KB	Output is correct
3	Correct	754 ms	11256 KB	Output is correct
4	Correct	972 ms	11316 KB	Output is correct
5	Correct	756 ms	11240 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	821 ms	11328 KB	Output is correct
2	Correct	802 ms	11236 KB	Output is correct
3	Correct	684 ms	11388 KB	Output is correct
4	Correct	929 ms	11364 KB	Output is correct
5	Correct	814 ms	11256 KB	Output is correct

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	672 ms	13016 KB	Output is correct
2	Correct	902 ms	12820 KB	Output is correct
3	Correct	871 ms	12876 KB	Output is correct
4	Execution timed out	1085 ms	12836 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	919 ms	13044 KB	Output is correct
2	Execution timed out	1043 ms	12784 KB	Time limit exceeded
3	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	880 ms	16060 KB	Output is correct
2	Execution timed out	1089 ms	15940 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	1082 ms	15932 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

답안 #639202

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