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Submission #973181

# Submission time Handle Problem Language Result Execution time Memory
973181 2024-05-01T15:28:18 Z IdanRosen Mobile (BOI12_mobile) C++
0 / 100
 1000 ms 47424 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef long double ld;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    ll n, l;
    cin >> n >> l;

    vector<pll> arr(n);
    for (auto &ref: arr) cin >> ref.first >> ref.second;

    ld start = 0;
    ld end = 1e9;
    while (end - start > 1e-6) {
        ld mid = start + (end - start) / 2;

        bool check;
        {
            vector<pair<ld, ld>> ranges(n);
            for (int i = 0; i < n; i++) {
                ll center = arr[i].first;
                ld delta = sqrt(pow(mid, 2) - pow(arr[i].second, 2));
                ranges[i] = {center - delta, center + delta};
            }

            std::sort(ranges.begin(), ranges.end());

            pair<ld,ld> combined = ranges[0];
            for (int i = 1; i < n; i++) {
                pair<ld,ld>& curr = ranges[i];
                if (combined.second < curr.first) {
                    check = false;
                    break;
                }

                combined.second = curr.second;
            }

            if (combined.first <= 0 && l <= combined.second)
                check = true;
        }

        if (check)
            end = mid;
        else
            start = mid;
    }

    cout << setprecision(6) << start << endl;
}

Compilation message

mobile.cpp: In function 'int main()':
mobile.cpp:50:9: warning: 'check' may be used uninitialized in this function [-Wmaybe-uninitialized]
   50 |         if (check)
      |         ^~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 13 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 28 ms 708 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 29 ms 700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 422 ms 3960 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 535 ms 4136 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 456 ms 4576 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 795 ms 5164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 309 ms 5156 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1033 ms 24144 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1043 ms 23888 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1016 ms 28528 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1018 ms 28632 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1022 ms 33300 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1045 ms 33300 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1058 ms 37972 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1051 ms 37908 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1053 ms 47332 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1032 ms 47424 KB Time limit exceeded
2 Halted 0 ms 0 KB -