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Submission #862455

# Submission time Handle Problem Language Result Execution time Memory
862455 2023-10-18T09:16:15 Z AndreiVerestiuc Mobile (BOI12_mobile) C++11
0 / 100
 939 ms 40276 KB 
#include <bits/stdc++.h>
#define diff 0.0000001
#define p pair<double,double>
using namespace std;
bool Check(double d,vector<p> v,int n,int l) {
    double st,dr;
    double distance=sqrt(d*d-v[0].second*v[0].second);
    st=max((double)0,v[0].first-distance);
    dr=min((double)l,v[0].first+distance);

    for (int i=1; i<n; i++) {
        double x=v[i].first,y=v[i].second;
        double distance=sqrt(d*d-y*y);
        if (dr>=max((double)0,x-distance)) dr=min((double)l,x+distance);
        else  return 0;
    }
    return (abs((double)l-dr)<=diff && st<=diff);
}
int main()
{
    int n,l;
    cin>>n>>l;
    vector< p > v(n);
    for (int i=0; i<n; i++)
        cin>>v[i].first>>v[i].second;

    double st=0,dr=1e9,mij;
    while (abs(dr-st)>diff) {
        mij=(st+dr)/2;
        //cout<<st<<' '<<dr<<' '<<mij<<'\n';
        if (Check(mij,v,n,l)) dr=mij;
        else  st=mij;
    }
    cout<<fixed<<setprecision(6)<<dr<<'\n';
    return 0;
}

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 2 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 4 ms 604 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 604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 600 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 56 ms 3260 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 57 ms 3468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 3824 KB Output is correct
2 Incorrect 73 ms 3756 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 90 ms 4688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 83 ms 4688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 370 ms 18604 KB Output is correct
2 Correct 461 ms 20148 KB Output is correct
3 Correct 449 ms 19916 KB Output is correct
4 Incorrect 470 ms 21156 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 465 ms 20660 KB Output is correct
2 Incorrect 398 ms 19636 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 451 ms 22380 KB Output is correct
2 Incorrect 603 ms 23992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 559 ms 24496 KB Output is correct
2 Incorrect 482 ms 23204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 536 ms 25528 KB Output is correct
2 Incorrect 654 ms 27828 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 670 ms 28352 KB Output is correct
2 Incorrect 602 ms 27288 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 632 ms 29116 KB Output is correct
2 Incorrect 751 ms 31672 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 771 ms 32388 KB Output is correct
2 Incorrect 659 ms 30900 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 754 ms 36560 KB Output is correct
2 Incorrect 919 ms 39620 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 939 ms 40276 KB Output is correct
2 Incorrect 809 ms 38608 KB Output isn't correct
3 Halted 0 ms 0 KB -