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Submission #965005

# Submission time Handle Problem Language Result Execution time Memory
965005 2024-04-18T02:53:42 Z pcc Mobile (BOI12_mobile) C++17
4 / 100
 1000 ms 56840 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#define ld double
#define pld pair<ld,ld>

const int mxn = 1e6+10;
ll N,L;
pair<ll,ll> arr[mxn];

inline bool check(ld r){
	vector<pld> v;
	for(int i = 0;i<N;i++){
		if(r<abs(arr[i].sc))continue;
		v.push_back(pld(arr[i].fs-sqrt(r*r-arr[i].sc*arr[i].sc),arr[i].fs+sqrt(r*r-arr[i].sc*arr[i].sc)));
	}
	sort(v.begin(),v.end());
	ld pre = 0;
	for(auto &i:v){
		if(pre>L)return true;
		if(pre<i.fs)return false;
		pre = max(pre,i.sc);
	}
	return pre>L;
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	ld l = 0,r = 2e9;
	cin>>N>>L;
	for(int i = 0;i<N;i++)cin>>arr[i].fs>>arr[i].sc;
	for(int i = 0;i<40;i++){
		ld mid = (l+r)/2;
		if(check(mid))r = mid;
		else l = mid;
	}
	cout<<fixed<<setprecision(10)<<l<<'\n';
	return 0;
}

Subtask #1
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 #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 604 KB Output is correct
2 Correct 3 ms 636 KB Output is correct
3 Incorrect 3 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 872 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 812 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 812 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 95 ms 6748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 107 ms 6552 KB Output is correct
2 Incorrect 94 ms 6680 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 6684 KB Output is correct
2 Incorrect 208 ms 7232 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 220 ms 7448 KB Output is correct
2 Incorrect 286 ms 8192 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 157 ms 7396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 812 ms 27488 KB Output is correct
2 Execution timed out 1022 ms 32640 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1036 ms 29292 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 959 ms 39668 KB Output is correct
2 Execution timed out 1012 ms 46396 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1028 ms 43512 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 1057 ms 44264 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 1049 ms 47888 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 1038 ms 49548 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 1038 ms 52312 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 1008 ms 52816 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 1052 ms 56840 KB Time limit exceeded
2 Halted 0 ms 0 KB -