Submission #468774

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
468774	2021-08-29T14:56:48 Z	DDTerziev04	Mobile (BOI12_mobile)	C++14	90 / 100	547 ms	35208 KB

mobile

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;

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

pair<long long, long long> 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-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 << fixed << setprecision(3) << 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	0 ms	204 KB	Output is correct
3	Correct	0 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	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	204 KB	Output is correct

Subtask #3
4.0 / 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	Correct	2 ms	332 KB	Output is correct

Subtask #4
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	332 KB	Output is correct
2	Correct	2 ms	332 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	3 ms	448 KB	Output is correct

Subtask #5
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	332 KB	Output is correct
2	Correct	3 ms	332 KB	Output is correct
3	Correct	3 ms	332 KB	Output is correct
4	Correct	3 ms	460 KB	Output is correct

Subtask #6
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	332 KB	Output is correct
2	Correct	3 ms	332 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	3 ms	460 KB	Output is correct
5	Correct	3 ms	332 KB	Output is correct

Subtask #7
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	39 ms	1484 KB	Output is correct
2	Correct	32 ms	1432 KB	Output is correct
3	Correct	23 ms	1780 KB	Output is correct
4	Correct	39 ms	2600 KB	Output is correct
5	Correct	23 ms	1592 KB	Output is correct

Subtask #8
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	34 ms	1484 KB	Output is correct
2	Correct	33 ms	1404 KB	Output is correct
3	Correct	39 ms	1484 KB	Output is correct
4	Correct	40 ms	2740 KB	Output is correct
5	Correct	45 ms	3096 KB	Output is correct

Subtask #9
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	34 ms	1612 KB	Output is correct
2	Correct	37 ms	1528 KB	Output is correct
3	Correct	37 ms	2548 KB	Output is correct
4	Correct	54 ms	3776 KB	Output is correct
5	Correct	43 ms	2508 KB	Output is correct

Subtask #10
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	43 ms	1868 KB	Output is correct
2	Correct	44 ms	3276 KB	Output is correct
3	Correct	42 ms	2896 KB	Output is correct
4	Correct	55 ms	3784 KB	Output is correct
5	Correct	49 ms	3100 KB	Output is correct

Subtask #11
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	46 ms	1936 KB	Output is correct
2	Correct	44 ms	3272 KB	Output is correct
3	Correct	44 ms	2892 KB	Output is correct
4	Correct	56 ms	3808 KB	Output is correct
5	Correct	48 ms	3128 KB	Output is correct

Subtask #12
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	201 ms	8128 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #13
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	223 ms	8252 KB	Output is correct
2	Correct	287 ms	14732 KB	Output is correct
3	Correct	214 ms	13944 KB	Output is correct
4	Correct	269 ms	17348 KB	Output is correct
5	Correct	245 ms	15324 KB	Output is correct

Subtask #14
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	234 ms	9800 KB	Output is correct
2	Correct	261 ms	18932 KB	Output is correct
3	Correct	256 ms	18332 KB	Output is correct
4	Correct	335 ms	21464 KB	Output is correct
5	Correct	287 ms	17676 KB	Output is correct

Subtask #15
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	257 ms	9604 KB	Output is correct
2	Correct	349 ms	17668 KB	Output is correct
3	Correct	248 ms	16528 KB	Output is correct
4	Correct	327 ms	21440 KB	Output is correct
5	Correct	292 ms	18372 KB	Output is correct

Subtask #16
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	276 ms	11336 KB	Output is correct
2	Correct	308 ms	22164 KB	Output is correct
3	Correct	313 ms	21464 KB	Output is correct
4	Correct	380 ms	24716 KB	Output is correct
5	Correct	343 ms	20188 KB	Output is correct

Subtask #17
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	304 ms	11348 KB	Output is correct
2	Correct	387 ms	20496 KB	Output is correct
3	Correct	295 ms	19636 KB	Output is correct
4	Correct	371 ms	24516 KB	Output is correct
5	Correct	343 ms	21440 KB	Output is correct

Subtask #18
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	324 ms	12868 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #19
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	344 ms	12756 KB	Output is correct
2	Correct	443 ms	23348 KB	Output is correct
3	Correct	338 ms	22352 KB	Output is correct
4	Correct	426 ms	28276 KB	Output is correct
5	Correct	393 ms	24388 KB	Output is correct

Subtask #20
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	388 ms	15940 KB	Output is correct
2	Correct	447 ms	31404 KB	Output is correct
3	Correct	424 ms	30456 KB	Output is correct
4	Correct	543 ms	35052 KB	Output is correct
5	Correct	497 ms	29592 KB	Output is correct

Subtask #21
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	427 ms	15936 KB	Output is correct
2	Correct	547 ms	29232 KB	Output is correct
3	Correct	426 ms	28308 KB	Output is correct
4	Correct	535 ms	35208 KB	Output is correct
5	Correct	489 ms	30788 KB	Output is correct

Submission #468774

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