답안 #639208

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
639208	2022-09-09T00:59:54 Z	Pietra	Mobile (BOI12_mobile)	C++14	70 / 100	1000 ms	15924 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 ;

    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	1 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	340 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	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	9 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	376 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	76 ms	1392 KB	Output is correct
2	Correct	85 ms	1384 KB	Output is correct
3	Correct	55 ms	1132 KB	Output is correct
4	Correct	107 ms	1356 KB	Output is correct
5	Correct	42 ms	984 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	83 ms	1440 KB	Output is correct
2	Correct	99 ms	1356 KB	Output is correct
3	Correct	99 ms	1576 KB	Output is correct
4	Correct	105 ms	1480 KB	Output is correct
5	Correct	122 ms	1612 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	74 ms	1576 KB	Output is correct
2	Correct	88 ms	1556 KB	Output is correct
3	Correct	84 ms	1564 KB	Output is correct
4	Correct	156 ms	1812 KB	Output is correct
5	Correct	97 ms	1612 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	116 ms	1852 KB	Output is correct
2	Correct	106 ms	1828 KB	Output is correct
3	Correct	94 ms	1740 KB	Output is correct
4	Correct	156 ms	1864 KB	Output is correct
5	Correct	127 ms	1784 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	124 ms	1856 KB	Output is correct
2	Correct	106 ms	1784 KB	Output is correct
3	Correct	90 ms	1740 KB	Output is correct
4	Correct	156 ms	1836 KB	Output is correct
5	Correct	123 ms	1856 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	420 ms	8084 KB	Output is correct
2	Correct	556 ms	8012 KB	Output is correct
3	Correct	539 ms	8152 KB	Output is correct
4	Correct	771 ms	8124 KB	Output is correct
5	Correct	615 ms	8076 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	598 ms	8076 KB	Output is correct
2	Correct	564 ms	8104 KB	Output is correct
3	Correct	467 ms	8100 KB	Output is correct
4	Correct	752 ms	8120 KB	Output is correct
5	Correct	655 ms	8040 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	525 ms	9692 KB	Output is correct
2	Correct	681 ms	9624 KB	Output is correct
3	Correct	669 ms	9764 KB	Output is correct
4	Correct	942 ms	9644 KB	Output is correct
5	Correct	734 ms	9652 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	708 ms	9624 KB	Output is correct
2	Correct	676 ms	9676 KB	Output is correct
3	Correct	583 ms	9648 KB	Output is correct
4	Correct	927 ms	9640 KB	Output is correct
5	Correct	774 ms	9688 KB	Output is correct

Subtask #16
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	621 ms	11324 KB	Output is correct
2	Correct	788 ms	11280 KB	Output is correct
3	Correct	755 ms	11164 KB	Output is correct
4	Execution timed out	1063 ms	11176 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	813 ms	11272 KB	Output is correct
2	Correct	779 ms	11260 KB	Output is correct
3	Correct	667 ms	11212 KB	Output is correct
4	Execution timed out	1097 ms	11156 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	701 ms	12784 KB	Output is correct
2	Correct	888 ms	12876 KB	Output is correct
3	Correct	858 ms	12724 KB	Output is correct
4	Execution timed out	1091 ms	12868 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	943 ms	12796 KB	Output is correct
2	Correct	889 ms	12856 KB	Output is correct
3	Correct	770 ms	12848 KB	Output is correct
4	Execution timed out	1088 ms	12724 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	15864 KB	Output is correct
2	Execution timed out	1100 ms	15900 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	15924 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

답안 #639208

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