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답안 #551289

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
551289 2022-04-20T08:24:27 Z narcissus Mobile (BOI12_mobile) C++17
0 / 100
 950 ms 15932 KB 
#include <iostream>
#include <algorithm>
#include <cmath>
#include <iomanip>

using namespace std;

int main()
{
    int n, l;
    cin >> n >> l;
    pair<long long, long long> coords[n];
    for (int i = 0; i < n; i++) {
        cin >> coords[i].first >> coords[i].second;
    }

    double low = 1, high = 2e9;
    while (high - low > 1e-3) {
        double mid = low + (high - low) / 2;
        // cout << mid << ":" << endl;
        double maxv = 0;
        for (int i = 0; i < n; i++) {
            long long x = coords[i].first;
            long long y = coords[i].second;
            double xdist = sqrt(abs(pow(mid, 2) - pow(y, 2)));
            double a1 = max((double)0, x - xdist);
            double a2 = min((double)l, x + xdist);
            // cout << "a " << a1 << ' ' << a2 << endl;
            if (a1 <= maxv)
                maxv = max(maxv, a2);
        }
        if (maxv >= l) {
            high = mid;
        } else {
            low = mid;
        }
    }
    cout << fixed << setprecision(4) << high << endl;

    return 0;
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 288 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 4 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 52 ms 1440 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 78 ms 1500 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 48 ms 1652 KB Output is correct
2 Correct 76 ms 1492 KB Output is correct
3 Incorrect 59 ms 1600 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 1748 KB Output is correct
2 Correct 72 ms 1748 KB Output is correct
3 Incorrect 74 ms 1840 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 1840 KB Output is correct
2 Correct 78 ms 1832 KB Output is correct
3 Incorrect 63 ms 1748 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 328 ms 8100 KB Output is correct
2 Correct 382 ms 8020 KB Output is correct
3 Correct 489 ms 8140 KB Output is correct
4 Incorrect 478 ms 8020 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 412 ms 8100 KB Output is correct
2 Incorrect 369 ms 8096 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 352 ms 9664 KB Output is correct
2 Correct 464 ms 9660 KB Output is correct
3 Correct 451 ms 9676 KB Output is correct
4 Incorrect 611 ms 9660 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 488 ms 9664 KB Output is correct
2 Incorrect 456 ms 9664 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 410 ms 11228 KB Output is correct
2 Correct 556 ms 11220 KB Output is correct
3 Correct 536 ms 11340 KB Output is correct
4 Incorrect 676 ms 11236 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 567 ms 11228 KB Output is correct
2 Incorrect 504 ms 11232 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 504 ms 12796 KB Output is correct
2 Correct 626 ms 12796 KB Output is correct
3 Correct 584 ms 12880 KB Output is correct
4 Incorrect 839 ms 12792 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 641 ms 12796 KB Output is correct
2 Incorrect 592 ms 12792 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 581 ms 15928 KB Output is correct
2 Correct 787 ms 15924 KB Output is correct
3 Correct 729 ms 15932 KB Output is correct
4 Incorrect 950 ms 15932 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 823 ms 15924 KB Output is correct
2 Incorrect 730 ms 15924 KB Output isn't correct
3 Halted 0 ms 0 KB -