oj.uz

Submission #468771

# Submission time Handle Problem Language Result Execution time Memory
468771 2021-08-29T14:46:29 Z DDTerziev04 Mobile (BOI12_mobile) C++14
8 / 100
 429 ms 8216 KB 
#include<iostream>
#include<cmath>
using namespace std;

const int MAXN=1e6;
const double MAXL=1e10;

pair<int, int> pts[MAXN];

bool CanCover(int n, int m, double l)
{
   double d=0;
   for(int i=0; i<n; i++)
   {
      double x=sqrt(l*l-(long long)pts[i].second*pts[i].second);
      if(pts[i].first-x<=d && pts[i].first+x>=d)
      {
         d=pts[i].first+x;
      }
   }

   return d>=m;
}

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

   int n, m;
   cin >> n >> m;

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

   double diff=0.001, l=0, r=MAXL, ans;
   while(r-l>=diff)
   {
      double mid=l+(r-l)/2;
      if(CanCover(n, m, mid))
      {
         ans=mid;
         r=mid;
      }
      else
      {
         l=mid;
      }
   }

   cout << ans << "\n";

   return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Incorrect 2 ms 332 KB Output isn't correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 332 KB Output is correct
2 Incorrect 3 ms 432 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 332 KB Output is correct
2 Incorrect 3 ms 332 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 332 KB Output is correct
2 Incorrect 3 ms 332 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 864 KB Output is correct
2 Incorrect 33 ms 1868 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 844 KB Output is correct
2 Correct 36 ms 1612 KB Output is correct
3 Incorrect 42 ms 1872 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 1092 KB Output is correct
2 Incorrect 35 ms 872 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 42 ms 1100 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 45 ms 1092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 195 ms 4168 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 219 ms 4140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 241 ms 4896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 273 ms 4996 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 264 ms 5780 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 312 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 298 ms 6584 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 354 ms 6528 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 380 ms 8004 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 429 ms 8216 KB Output isn't correct
2 Halted 0 ms 0 KB -