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답안 #932322

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
932322 2024-02-23T08:07:14 Z HuyAT Mobile (BOI12_mobile) C++14
4 / 100
 1000 ms 48212 KB 
#include<bits/stdc++.h>

const int MaxN = 1e6 + 10;
const long double Eps = 1e-6;
const long double MaxV = 1e18;

int n;
long double length,x[MaxN + 1],y[MaxN + 1];

void readData(){
    std::cin >> n >> length;
    for(int i = 1;i <= n;++i){
        std::cin >> x[i] >> y[i];
    }
}
bool f(long double mid){
    long double l = 1e10,r = 1e10;
    bool found = false;
    for(int i = 1;i <= n;++i){
        if(mid < y[i]){
            continue;
        }
        long double distance = sqrt(mid * mid - y[i] * y[i]);
        if(!found){
            found = true;
            l = x[i] - distance;
            r = x[i] + distance;
        }else{
            if(r >= x[i] - distance && x[i] + distance >= l){
                l = std::min(l,x[i] - distance);
                r = std::max(r,x[i] + distance);
            }
        }
    }
    return (l <= 0 && r >= length);
}
long double solve(long double lo,long double hi){
    while(hi - lo > Eps){
        long double mid = (lo + hi) / 2;
        if(f(mid)){
            hi = mid;
        }else{
            lo = mid;
        }
//        std::cerr << mid << "\n";
    }
    return hi;
}
int main(){
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);std::cout.tie(nullptr);
    readData();
    std::cout << std::fixed << std::setprecision(8) << solve(0,MaxV * 2);
    return 0;
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 2396 KB Output is correct
2 Correct 7 ms 2648 KB Output is correct
3 Correct 6 ms 2772 KB Output is correct
4 Correct 8 ms 2652 KB Output is correct

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 2648 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2652 KB Output is correct
2 Correct 7 ms 2652 KB Output is correct
3 Correct 6 ms 2392 KB Output is correct
4 Incorrect 7 ms 2652 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 83 ms 7584 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 89 ms 7544 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 7464 KB Output is correct
2 Correct 98 ms 7772 KB Output is correct
3 Correct 92 ms 7768 KB Output is correct
4 Incorrect 147 ms 8732 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 121 ms 8284 KB Output is correct
2 Correct 121 ms 8280 KB Output is correct
3 Correct 113 ms 7820 KB Output is correct
4 Incorrect 147 ms 8752 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 118 ms 8272 KB Output is correct
2 Correct 122 ms 8440 KB Output is correct
3 Correct 114 ms 7828 KB Output is correct
4 Incorrect 150 ms 8532 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 602 ms 23392 KB Output is correct
2 Correct 615 ms 26828 KB Output is correct
3 Correct 601 ms 26332 KB Output is correct
4 Incorrect 788 ms 28688 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 631 ms 27272 KB Output is correct
2 Incorrect 554 ms 25600 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 715 ms 28528 KB Output is correct
2 Correct 733 ms 32492 KB Output is correct
3 Correct 728 ms 31912 KB Output is correct
4 Incorrect 702 ms 35112 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 739 ms 32848 KB Output is correct
2 Correct 662 ms 31060 KB Output is correct
3 Correct 665 ms 29944 KB Output is correct
4 Incorrect 879 ms 34952 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 833 ms 31308 KB Output is correct
2 Correct 851 ms 36108 KB Output is correct
3 Correct 846 ms 35460 KB Output is correct
4 Execution timed out 1033 ms 38740 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 884 ms 36744 KB Output is correct
2 Correct 766 ms 34644 KB Output is correct
3 Correct 779 ms 33856 KB Output is correct
4 Incorrect 988 ms 38684 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 944 ms 36456 KB Output is correct
2 Correct 978 ms 41916 KB Output is correct
3 Correct 984 ms 41040 KB Output is correct
4 Execution timed out 1055 ms 44884 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 993 ms 42544 KB Output is correct
2 Incorrect 900 ms 40016 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1006 ms 40276 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1038 ms 48212 KB Time limit exceeded
2 Halted 0 ms 0 KB -