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Submission #919371

# Submission time Handle Problem Language Result Execution time Memory
919371 2024-01-31T16:48:40 Z ethanv13 Mobile (BOI12_mobile) C++17
0 / 100
 1000 ms 65968 KB 
#include <bits/stdc++.h>
using namespace std;
vector<pair<long long,long long>>c;long long n,l;
bool can(long double mid){
	vector<pair<long double,long double>>seg;
	for(int i=0;i<n;++i){
		if(mid<abs(c[i].second)){
			return false;
		}
		else {
			long double delta=sqrt(mid*mid-c[i].second*c[i].second);
			seg.push_back({c[i].first-delta,c[i].first+delta});
		}
	}
	long double currub=0;
	for(int i=0;i<n;++i){
		if(seg[i].first<=currub){
			currub=max(currub,seg[i].second);
		}
	}
	return currub>=l;
}
int main() {
	cin>>n>>l;
	for(int i=0;i<n;++i){
		long long x,y;cin>>x>>y;c.push_back({x,y});
	}
	long double lo=0;long double hi=2e9;
	for(int i=0;i<45;++i){
		long double mid=(lo+hi)/2;
		if(can(mid)){
			hi=mid;
		}
		else {
			lo=mid;
		}
	}
	cout<<fixed<<setprecision(9);
	cout<<lo<<endl;
};

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 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 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 704 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 920 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 920 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 924 KB Output is correct
2 Correct 11 ms 940 KB Output is correct
3 Incorrect 8 ms 936 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 148 ms 9220 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 115 ms 8724 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 166 ms 9220 KB Output is correct
2 Correct 181 ms 9336 KB Output is correct
3 Incorrect 115 ms 10120 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 198 ms 9340 KB Output is correct
2 Correct 216 ms 9744 KB Output is correct
3 Incorrect 141 ms 10084 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 207 ms 9892 KB Output is correct
2 Correct 202 ms 10272 KB Output is correct
3 Incorrect 131 ms 9360 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 900 ms 40360 KB Output is correct
2 Correct 998 ms 40708 KB Output is correct
3 Correct 988 ms 40360 KB Output is correct
4 Incorrect 848 ms 40588 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 949 ms 40544 KB Output is correct
2 Incorrect 738 ms 40372 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1016 ms 60736 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1036 ms 62228 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1022 ms 62400 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1039 ms 63148 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1006 ms 63420 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1033 ms 63472 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1010 ms 65968 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1030 ms 65824 KB Time limit exceeded
2 Halted 0 ms 0 KB -