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Submission #702621

# Submission time Handle Problem Language Result Execution time Memory
702621 2023-02-24T15:17:45 Z nguyennehehe Mobile (BOI12_mobile) C++14
0 / 100
 404 ms 8560 KB 
#include "bits/stdc++.h"
using namespace std;

const int INF = 1e9 + 7;

int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    
    int n, L; cin >> n >> L;
    vector<pair<int, int>> a(n);
    for (auto &x: a) cin >> x.first >> x.second;

    auto good = [&](double R) {
        vector<pair<double, double>> b;
        for (auto i: a) {
            long long u, v; tie(u, v) = i;
            #define sqr(x) (x) * (x)
            if (sqr(R) - sqr(v)) continue;
            double delta = sqrt(sqr(R) - sqr(v));
            double x1 = -delta + u, x2 = delta + u;
            b.emplace_back(x1, x2);
            // cout << fixed << setprecision(10) << x1 << ' ' << x2 << '\n';
        }
        
        sort(b.begin(), b.end());
        double l = 0;
        for (auto i: b) {
            if (i.first <= l) l = max(l, i.second);
        }
        return l >= L;
    };

    double l = -1, r = 1e9 + 1;
    for (int i = 1, ITER = 100; i <= ITER; ++i) {
        double m = l + (r - l) / 2;
        if (good(m)) r = m;
        else l = m;
    }
    cout << fixed << setprecision(10) << r;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 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 Incorrect 1 ms 340 KB Output isn't correct
2 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 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

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

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 1108 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 22 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 1276 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 38 ms 1548 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 40 ms 1580 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 140 ms 4608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 151 ms 4704 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 170 ms 5460 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 206 ms 5484 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 187 ms 6256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 242 ms 6268 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 212 ms 7044 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 262 ms 7052 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 339 ms 8560 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 404 ms 8148 KB Output isn't correct
2 Halted 0 ms 0 KB -