oj.uz

Submission #715664

# Submission time Handle Problem Language Result Execution time Memory
715664 2023-03-27T12:58:20 Z MilosMilutinovic Mobile (BOI12_mobile) C++14
0 / 100
 964 ms 27340 KB 
#include <bits/stdc++.h>

using i64 = long long;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int n, L;
    std::cin >> n >> L;

    std::vector<int> x(n), y(n);
    for (int i = 0; i < n; i++) {
        std::cin >> x[i] >> y[i];
    }

    const double eps = 1E-4;

    std::function<bool(double)> check = [&](double r) {
        double f = 0;
        for (int i = 0; i < n; i++) {
            if (r * r >= (long double) y[i] * y[i]) {
                double p = std::sqrt(r * r - (long double) y[i] * y[i]);
                if (x[i] - p <= f) {
                    f = x[i] + p;
                }
            }
        }
        return f + eps >= L;
    };

    double low = 0, high = 2E9, ans = -1;
    for (int i = 0; i < 100; i++) {
        double mid = (low + high) / 2;
        if (check(mid)) {
            ans = mid;
            high = mid;
        } else {
            low = mid;
        }
    }

    std::cout << std::fixed << std::setprecision(4) << ans << "\n";

    return 0;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 328 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Incorrect 1 ms 328 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 340 KB Output is correct
2 Correct 5 ms 340 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Incorrect 3 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 80 ms 1720 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 1676 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 1696 KB Output is correct
2 Correct 87 ms 2100 KB Output is correct
3 Correct 53 ms 1996 KB Output is correct
4 Incorrect 37 ms 3020 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 2632 KB Output is correct
2 Correct 66 ms 2512 KB Output is correct
3 Correct 54 ms 2252 KB Output is correct
4 Incorrect 40 ms 3012 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 2616 KB Output is correct
2 Correct 74 ms 2512 KB Output is correct
3 Correct 51 ms 2124 KB Output is correct
4 Incorrect 36 ms 3024 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 275 ms 8528 KB Output is correct
2 Correct 325 ms 12036 KB Output is correct
3 Correct 293 ms 11524 KB Output is correct
4 Incorrect 192 ms 13692 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 299 ms 12556 KB Output is correct
2 Incorrect 566 ms 10752 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 10316 KB Output is correct
2 Correct 361 ms 14304 KB Output is correct
3 Correct 388 ms 13700 KB Output is correct
4 Incorrect 221 ms 16912 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 382 ms 14888 KB Output is correct
2 Incorrect 694 ms 12940 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 420 ms 11864 KB Output is correct
2 Correct 417 ms 16648 KB Output is correct
3 Correct 407 ms 15972 KB Output is correct
4 Incorrect 283 ms 19244 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 416 ms 17428 KB Output is correct
2 Incorrect 793 ms 15052 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 452 ms 13524 KB Output is correct
2 Correct 471 ms 18984 KB Output is correct
3 Correct 509 ms 18216 KB Output is correct
4 Incorrect 271 ms 22252 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 477 ms 19900 KB Output is correct
2 Incorrect 876 ms 17164 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 594 ms 16848 KB Output is correct
2 Correct 594 ms 23764 KB Output is correct
3 Correct 570 ms 22988 KB Output is correct
4 Incorrect 410 ms 27340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 656 ms 24680 KB Output is correct
2 Incorrect 964 ms 21332 KB Output isn't correct
3 Halted 0 ms 0 KB -