답안 #639207

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
639207	2022-09-09T00:57:49 Z	Pietra	Mobile (BOI12_mobile)	C++14	75 / 100	1000 ms	15988 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) 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*1.00, mid ;

    while(fim - ini > 1e-6){
        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	0 ms	212 KB	Output is correct
3	Correct	1 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	3 ms	340 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	5 ms	340 KB	Output is correct
2	Correct	6 ms	388 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	6 ms	392 KB	Output is correct
3	Correct	5 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	6 ms	356 KB	Output is correct
3	Correct	5 ms	340 KB	Output is correct
4	Correct	7 ms	340 KB	Output is correct
5	Correct	5 ms	340 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	88 ms	1428 KB	Output is correct
2	Correct	82 ms	1520 KB	Output is correct
3	Correct	52 ms	1088 KB	Output is correct
4	Correct	93 ms	1356 KB	Output is correct
5	Correct	45 ms	980 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	80 ms	1496 KB	Output is correct
2	Correct	74 ms	1312 KB	Output is correct
3	Correct	86 ms	1460 KB	Output is correct
4	Correct	113 ms	1484 KB	Output is correct
5	Correct	116 ms	1696 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	71 ms	1740 KB	Output is correct
2	Correct	89 ms	1500 KB	Output is correct
3	Correct	83 ms	1592 KB	Output is correct
4	Correct	152 ms	1740 KB	Output is correct
5	Correct	89 ms	1584 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	114 ms	1792 KB	Output is correct
2	Correct	110 ms	1860 KB	Output is correct
3	Correct	94 ms	1856 KB	Output is correct
4	Correct	152 ms	1856 KB	Output is correct
5	Correct	111 ms	1924 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	113 ms	1820 KB	Output is correct
2	Correct	109 ms	1840 KB	Output is correct
3	Correct	105 ms	1796 KB	Output is correct
4	Correct	139 ms	1800 KB	Output is correct
5	Correct	111 ms	1868 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	460 ms	8148 KB	Output is correct
2	Correct	565 ms	8120 KB	Output is correct
3	Correct	636 ms	8108 KB	Output is correct
4	Correct	689 ms	8200 KB	Output is correct
5	Correct	579 ms	8136 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	592 ms	8160 KB	Output is correct
2	Correct	620 ms	8136 KB	Output is correct
3	Correct	483 ms	8112 KB	Output is correct
4	Correct	671 ms	8120 KB	Output is correct
5	Correct	585 ms	8248 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	519 ms	9696 KB	Output is correct
2	Correct	678 ms	9764 KB	Output is correct
3	Correct	692 ms	9820 KB	Output is correct
4	Correct	876 ms	9588 KB	Output is correct
5	Correct	688 ms	9800 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	719 ms	9696 KB	Output is correct
2	Correct	755 ms	9876 KB	Output is correct
3	Correct	577 ms	9688 KB	Output is correct
4	Correct	837 ms	9788 KB	Output is correct
5	Correct	697 ms	9780 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	587 ms	11264 KB	Output is correct
2	Correct	789 ms	11248 KB	Output is correct
3	Correct	756 ms	11204 KB	Output is correct
4	Correct	979 ms	11164 KB	Output is correct
5	Correct	779 ms	11252 KB	Output is correct

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	836 ms	11280 KB	Output is correct
2	Correct	910 ms	11324 KB	Output is correct
3	Correct	706 ms	11312 KB	Output is correct
4	Execution timed out	1006 ms	11272 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	698 ms	12952 KB	Output is correct
2	Correct	890 ms	12752 KB	Output is correct
3	Correct	912 ms	12820 KB	Output is correct
4	Execution timed out	1098 ms	12876 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	925 ms	12832 KB	Output is correct
2	Correct	972 ms	12876 KB	Output is correct
3	Correct	799 ms	12924 KB	Output is correct
4	Execution timed out	1065 ms	12708 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	891 ms	15908 KB	Output is correct
2	Execution timed out	1084 ms	15888 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	1096 ms	15988 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

답안 #639207

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