답안 #639203

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
639203	2022-09-09T00:40:35 Z	Pietra	Mobile (BOI12_mobile)	C++14	80 / 100	1000 ms	16008 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 = 51 ;

    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	1 ms	212 KB	Output is correct
4	Correct	1 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	344 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	340 KB	Output is correct
3	Correct	4 ms	340 KB	Output is correct
4	Correct	6 ms	376 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	392 KB	Output is correct
2	Correct	6 ms	340 KB	Output is correct
3	Correct	4 ms	340 KB	Output is correct
4	Correct	8 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	7 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	4 ms	396 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	82 ms	1468 KB	Output is correct
2	Correct	89 ms	1484 KB	Output is correct
3	Correct	53 ms	1136 KB	Output is correct
4	Correct	99 ms	1472 KB	Output is correct
5	Correct	43 ms	964 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	75 ms	1496 KB	Output is correct
2	Correct	73 ms	1392 KB	Output is correct
3	Correct	91 ms	1548 KB	Output is correct
4	Correct	97 ms	1548 KB	Output is correct
5	Correct	116 ms	1596 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	72 ms	1556 KB	Output is correct
2	Correct	91 ms	1584 KB	Output is correct
3	Correct	84 ms	1632 KB	Output is correct
4	Correct	141 ms	1796 KB	Output is correct
5	Correct	89 ms	1600 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	115 ms	1824 KB	Output is correct
2	Correct	108 ms	1820 KB	Output is correct
3	Correct	102 ms	1896 KB	Output is correct
4	Correct	139 ms	1836 KB	Output is correct
5	Correct	108 ms	1868 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	114 ms	1740 KB	Output is correct
2	Correct	108 ms	1760 KB	Output is correct
3	Correct	98 ms	1932 KB	Output is correct
4	Correct	140 ms	1904 KB	Output is correct
5	Correct	108 ms	1768 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	432 ms	8044 KB	Output is correct
2	Correct	562 ms	8008 KB	Output is correct
3	Correct	567 ms	8136 KB	Output is correct
4	Correct	689 ms	8308 KB	Output is correct
5	Correct	572 ms	8112 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	603 ms	8200 KB	Output is correct
2	Correct	625 ms	8120 KB	Output is correct
3	Correct	483 ms	8028 KB	Output is correct
4	Correct	663 ms	8124 KB	Output is correct
5	Correct	581 ms	8272 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	515 ms	9800 KB	Output is correct
2	Correct	668 ms	9672 KB	Output is correct
3	Correct	648 ms	9588 KB	Output is correct
4	Correct	827 ms	9856 KB	Output is correct
5	Correct	656 ms	9816 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	699 ms	9676 KB	Output is correct
2	Correct	728 ms	9652 KB	Output is correct
3	Correct	588 ms	9712 KB	Output is correct
4	Correct	816 ms	9804 KB	Output is correct
5	Correct	691 ms	9820 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	604 ms	11252 KB	Output is correct
2	Correct	804 ms	11324 KB	Output is correct
3	Correct	764 ms	11180 KB	Output is correct
4	Correct	940 ms	11376 KB	Output is correct
5	Correct	753 ms	11324 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	827 ms	11164 KB	Output is correct
2	Correct	850 ms	11296 KB	Output is correct
3	Correct	690 ms	11152 KB	Output is correct
4	Correct	942 ms	11320 KB	Output is correct
5	Correct	807 ms	11284 KB	Output is correct

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	703 ms	12892 KB	Output is correct
2	Correct	916 ms	13016 KB	Output is correct
3	Correct	879 ms	12876 KB	Output is correct
4	Execution timed out	1079 ms	12704 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	935 ms	12844 KB	Output is correct
2	Correct	936 ms	12920 KB	Output is correct
3	Correct	798 ms	13088 KB	Output is correct
4	Execution timed out	1086 ms	12800 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	857 ms	15952 KB	Output is correct
2	Execution timed out	1097 ms	15936 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	1089 ms	16008 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

답안 #639203

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