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Submission #708964

# Submission time Handle Problem Language Result Execution time Memory
708964 2023-03-12T22:31:46 Z mmaiti Mobile (BOI12_mobile) C++11
8 / 100
 753 ms 8128 KB 
#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
vector<pii> coords;

double eps = 1e-5;
int N, L;
bool not_works(double val)
{
    double curr = 0;
    for(int i = 0; i < N; i++)
    {
        double temp_begin = coords[i].first - sqrt(val*val - coords[i].second*coords[i].second);
        double temp_end = coords[i].first + sqrt(val*val - coords[i].second*coords[i].second);

        if(temp_begin <= curr)
        curr = max(curr, temp_end);
    }
    if(curr >= L)
    return true;
    else
    return false;
}
int main()
{
    
    cin >> N >> L;
    coords.resize(N);

    for(int i = 0; i < N; i++)
    {
        cin >> coords[i].first >> coords[i].second;
    }

    double lo = 1;
    double hi = 1.5e9;
    double mid;

    while(abs(hi-lo) > eps)
    {
        mid = (lo + hi)/2;
        if(not_works(mid))
        hi = mid;
        else
        lo = mid;
    }
    
    cout << setprecision(6) << lo << "\n";
}

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 1 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
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is correct
2 Correct 2 ms 212 KB Output is correct
3 Correct 2 ms 212 KB Output is correct
4 Incorrect 2 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 340 KB Output is correct
2 Incorrect 4 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 212 KB Output is correct
2 Incorrect 4 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 292 KB Output is correct
2 Incorrect 5 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 872 KB Output is correct
2 Incorrect 57 ms 888 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 900 KB Output is correct
2 Correct 58 ms 852 KB Output is correct
3 Incorrect 84 ms 924 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 992 KB Output is correct
2 Incorrect 57 ms 852 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 77 ms 1068 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 72 ms 980 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 265 ms 4208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 391 ms 4204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 321 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 447 ms 4980 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 395 ms 5836 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 517 ms 5784 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 428 ms 6560 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 631 ms 6552 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 549 ms 8120 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 753 ms 8128 KB Output isn't correct
2 Halted 0 ms 0 KB -