oj.uz

Submission #464196

# Submission time Handle Problem Language Result Execution time Memory
464196 2021-08-12T13:39:15 Z dqk Mobile (BOI12_mobile) C++17
65 / 100
 834 ms 55108 KB 
#include <bits/stdc++.h>

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int n;
    double L;
    std::cin >> n >> L;
    std::vector<std::vector<int>> p(n, std::vector<int>(2, 0));
    for (int i = 0; i < n; ++i) {
        std::cin >> p[i][0] >> p[i][1];
    }
    sort(p.begin(), p.end());
    double lo = 0.0, hi = 3e9;
    while(hi - lo > 1e-6) {
        double mi = lo + (hi - lo) / 2;
        double cur = 0.0;
        for (int i = 0; i < n; ++i) {
            double d = sqrt(mi * mi - 1ll * p[i][1] * p[i][1]);
            if (cur >= p[i][0] - d)
                cur = std::max(cur, p[i][0] + d);
        }
        if (cur >= L) {
            hi = mi;
        }
        else {
            lo = mi;
        }
    }
    std::cout << std::setprecision(10) << lo << "\n";
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 460 KB Output is correct
2 Correct 2 ms 460 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 3 ms 332 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 460 KB Output is correct
2 Correct 3 ms 460 KB Output is correct
3 Correct 3 ms 460 KB Output is correct
4 Correct 4 ms 460 KB Output is correct

Subtask #5
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 560 KB Output is correct
2 Correct 4 ms 460 KB Output is correct
3 Correct 3 ms 460 KB Output is correct
4 Correct 4 ms 580 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 460 KB Output is correct
2 Correct 3 ms 460 KB Output is correct
3 Correct 3 ms 460 KB Output is correct
4 Correct 4 ms 460 KB Output is correct
5 Correct 5 ms 588 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 4300 KB Output is correct
2 Correct 48 ms 4428 KB Output is correct
3 Correct 37 ms 3148 KB Output is correct
4 Correct 56 ms 4428 KB Output is correct
5 Correct 32 ms 3020 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 4504 KB Output is correct
2 Correct 52 ms 4056 KB Output is correct
3 Correct 63 ms 4676 KB Output is correct
4 Correct 58 ms 4556 KB Output is correct
5 Correct 70 ms 4940 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 5068 KB Output is correct
2 Correct 49 ms 4724 KB Output is correct
3 Correct 51 ms 4940 KB Output is correct
4 Correct 91 ms 5708 KB Output is correct
5 Correct 62 ms 5196 KB Output is correct

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 5704 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 5708 KB Output is correct
2 Correct 59 ms 5708 KB Output is correct
3 Correct 65 ms 5708 KB Output is correct
4 Correct 80 ms 5708 KB Output is correct
5 Correct 76 ms 5708 KB Output is correct

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 309 ms 27712 KB Output is correct
2 Incorrect 308 ms 27584 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 340 ms 27712 KB Output is correct
2 Correct 449 ms 27596 KB Output is correct
3 Correct 315 ms 27592 KB Output is correct
4 Correct 404 ms 27592 KB Output is correct
5 Correct 390 ms 27576 KB Output is correct

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 375 ms 33112 KB Output is correct
2 Incorrect 379 ms 33068 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 376 ms 33092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 403 ms 38532 KB Output is correct
2 Incorrect 434 ms 38620 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 440 ms 38636 KB Output is correct
2 Correct 599 ms 38592 KB Output is correct
3 Correct 473 ms 38624 KB Output is correct
4 Correct 571 ms 38604 KB Output is correct
5 Correct 531 ms 38644 KB Output is correct

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 493 ms 44124 KB Output is correct
2 Incorrect 506 ms 44112 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 504 ms 44100 KB Output is correct
2 Correct 698 ms 44068 KB Output is correct
3 Correct 524 ms 44012 KB Output is correct
4 Correct 678 ms 44100 KB Output is correct
5 Correct 625 ms 44100 KB Output is correct

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 572 ms 54984 KB Output is correct
2 Incorrect 629 ms 55108 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 639 ms 54976 KB Output is correct
2 Correct 834 ms 54980 KB Output is correct
3 Correct 638 ms 54976 KB Output is correct
4 Correct 821 ms 54980 KB Output is correct
5 Correct 768 ms 55108 KB Output is correct