oj.uz

Submission #974369

# Submission time Handle Problem Language Result Execution time Memory
974369 2024-05-03T09:19:34 Z vjudge1 Mobile (BOI12_mobile) C++17
12 / 100
 264 ms 23636 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<std::pair<int, int>> p(N);
    for (auto &[x, y] : p) {
        std::cin >> x >> y;
    }

    auto check = [&](double r) {
        double cur = 0;
        for (auto [x, y] : p) {
            double d = std::sqrt(r * r - y * y);
            if (x - d <= cur) {
                cur = std::max(cur, x + d);
            }
        }
        return cur >= L;
    };

    double ans = [&]() {
        double l = 0, r = 1.5E9;
        while (r - l > 1E-5) {
            double x = l + (r - l) / 2;
            if (check(x)) {
                r = x;
            } else {
                l = x;
            }
        }
        return l;
    }();

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

    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 600 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Incorrect 2 ms 564 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Incorrect 2 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 600 KB Output is correct
4 Incorrect 2 ms 576 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 856 KB Output is correct
2 Incorrect 20 ms 856 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 856 KB Output is correct
2 Correct 23 ms 860 KB Output is correct
3 Incorrect 35 ms 1052 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 1116 KB Output is correct
2 Incorrect 21 ms 860 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 1116 KB Output is correct
2 Incorrect 28 ms 2652 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 1116 KB Output is correct
2 Incorrect 26 ms 2652 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 4188 KB Output is correct
2 Incorrect 132 ms 11896 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 137 ms 4184 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 139 ms 4952 KB Output is correct
2 Incorrect 162 ms 14340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 157 ms 4952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 171 ms 5724 KB Output is correct
2 Incorrect 184 ms 16536 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 194 ms 5976 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 184 ms 6488 KB Output is correct
2 Incorrect 211 ms 18856 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 208 ms 6488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 224 ms 8280 KB Output is correct
2 Incorrect 264 ms 23636 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 259 ms 8284 KB Output isn't correct
2 Halted 0 ms 0 KB -