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Submission #589119

# Submission time Handle Problem Language Result Execution time Memory
589119 2022-07-04T09:29:32 Z jakubd Mobile (BOI12_mobile) C++17
17 / 100
 393 ms 16848 KB 
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);

  int n; double l; cin >> n >> l;

  vector<pair<long long, long long>> a;
  for (int i = 0; i < n; i++) {
    long long x, y; cin >> x >> y;
    a.push_back({x, y});
  }

  long double lo = 0, ri = 1e6;
  while (fabs(lo - ri) > 1e-6) {
    long double m = (lo + ri) / 2, cur = 0;
    
    for (int i = 0; i < n; i++) {
      long double d = sqrt(m * m - a[i].second * a[i].second);
      if (a[i].first - d <= cur) cur = max(cur, a[i].first + d);
    }

    if (cur - l > 1e-9) ri = m;
    else lo = m;
  }

  cout << fixed << setprecision(12) << lo << "\n";

  return 0;
};

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 468 KB Output is correct
2 Incorrect 2 ms 468 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 468 KB Output is correct
2 Incorrect 4 ms 468 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Incorrect 2 ms 468 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 2512 KB Output is correct
2 Incorrect 24 ms 2512 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 2408 KB Output is correct
2 Correct 72 ms 2512 KB Output is correct
3 Correct 89 ms 2512 KB Output is correct
4 Correct 91 ms 2512 KB Output is correct
5 Correct 95 ms 2408 KB Output is correct

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 2492 KB Output is correct
2 Incorrect 30 ms 2488 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 33 ms 2428 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 2512 KB Output is correct
2 Incorrect 30 ms 2464 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 193 ms 8632 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 190 ms 8728 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 236 ms 16764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 272 ms 16756 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 255 ms 16820 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 250 ms 16748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 291 ms 16744 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 302 ms 16780 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 382 ms 16744 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 393 ms 16848 KB Output isn't correct
2 Halted 0 ms 0 KB -