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Submission #872453

# Submission time Handle Problem Language Result Execution time Memory
872453 2023-11-13T06:44:52 Z sleepntsheep Balloons (CEOI11_bal) C++17
40 / 100
 2000 ms 3472 KB 
#include <iostream>
#include <iomanip> 
#include <cmath>
#include <cstring>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>

using i64 = long long;
using u64 = unsigned long long;
using f64 = double;
using f80 = long double;

using namespace std;
#define ALL(x) x.begin(), x.end()
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
#define N 200005

int n, x[N], r[N];
f80 rr[N];

int main()
{
    ShinLena;
    cin >> n;
    for (int i = 0; i < n; ++i) cin >> x[i] >> r[i];

    rr[0] = r[0];
    for (int st = 0, i = 1; i < n; ++i)
    {
        f80 l = 0, r = ::r[i], iter = 50;
        for (; iter--;)
        {
            f80 m = (l+r)/2, ok = 1;
            for (int j = i-1; ok && j >= 0; --j)
            {
                f80 A = 1L * x[i] * x[i] + 1L * x[j] * x[j] - 2L * x[i] * x[j] - 4L * rr[j] * m;
                if (A < 0) ok = 0;
            }
            if (ok) l = m;
            else r = m;
        }

        rr[i] = l;
        if (rr[i] >= ::rr[i-1]) st = i;
    }

    cout << fixed << setprecision(3);
    for (int i = 0; i < n; ++i)
        cout << rr[i] << '\n';

    return 0;
}

Compilation message

bal.cpp: In function 'int main()':
bal.cpp:32:14: warning: variable 'st' set but not used [-Wunused-but-set-variable]
   32 |     for (int st = 0, i = 1; i < n; ++i)
      |              ^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 2396 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 2512 KB 2000 numbers

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2066 ms 2780 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2071 ms 2644 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2027 ms 2664 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2045 ms 2684 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2040 ms 3080 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2066 ms 3472 KB Time limit exceeded
2 Halted 0 ms 0 KB -