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답안 #168810

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
168810 2019-12-16T14:55:49 Z MohamedAhmed04 Mobile (BOI12_mobile) C++14
50 / 100
 549 ms 4088 KB 
#include <bits/stdc++.h>

using namespace std ;

const int MAX = 1e5 + 10 ;
double x[MAX] , y[MAX] ;
int n ;
double l;

bool check(double radius)
{
	double now = 0.00 ;
	for(int i = 0 ; i < n ; ++i)
	{
		double a = sqrt(radius * radius - ((-y[i]) * (-y[i]))) + x[i] ;
		double b = -sqrt(radius * radius - ((-y[i]) * (-y[i]))) + x[i] ;
		if(a > b)
			swap(a , b) ;
		if(a <= now)
			now = max(now , b) ;

	}
	return (now >= l) ;
}

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n>>l ;
	for(int i = 0 ; i < n ; ++i)
		cin>>x[i]>>y[i] ;
	double low = 0.000 , high = 1e12 ;
	double ans = high ;
	for(int i = 0 ; i < 300 ; ++i)
	{
		double mid = (low + high) / 2.00 ;
		if(check(mid))
			ans = mid , high = mid ;
		else
			low = mid ;
	}
	return cout<<fixed<<setprecision(6)<<ans<<"\n" , 0 ;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct

Subtask #3
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 376 KB Output is correct
2 Correct 11 ms 376 KB Output is correct
3 Correct 12 ms 376 KB Output is correct
4 Correct 10 ms 376 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 376 KB Output is correct
2 Correct 19 ms 504 KB Output is correct
3 Correct 20 ms 504 KB Output is correct
4 Correct 28 ms 504 KB Output is correct

Subtask #5
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 376 KB Output is correct
2 Correct 19 ms 528 KB Output is correct
3 Correct 21 ms 504 KB Output is correct
4 Correct 29 ms 504 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 376 KB Output is correct
2 Correct 18 ms 376 KB Output is correct
3 Correct 20 ms 504 KB Output is correct
4 Correct 28 ms 428 KB Output is correct
5 Correct 27 ms 376 KB Output is correct

Subtask #7
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 397 ms 1556 KB Output is correct
2 Correct 255 ms 2808 KB Output is correct
3 Correct 202 ms 1784 KB Output is correct
4 Correct 402 ms 2828 KB Output is correct
5 Correct 253 ms 1596 KB Output is correct

Subtask #8
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 399 ms 1608 KB Output is correct
2 Correct 364 ms 2436 KB Output is correct
3 Correct 424 ms 2808 KB Output is correct
4 Correct 420 ms 2936 KB Output is correct
5 Correct 469 ms 3192 KB Output is correct

Subtask #9
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 275 ms 1768 KB Output is correct
2 Correct 273 ms 1788 KB Output is correct
3 Correct 314 ms 1784 KB Output is correct
4 Correct 542 ms 3832 KB Output is correct
5 Correct 456 ms 2824 KB Output is correct

Subtask #10
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 333 ms 1944 KB Output is correct
2 Correct 338 ms 1992 KB Output is correct
3 Correct 373 ms 2040 KB Output is correct
4 Correct 549 ms 4088 KB Output is correct
5 Correct 521 ms 3240 KB Output is correct

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 332 ms 1944 KB Output is correct
2 Correct 332 ms 1944 KB Output is correct
3 Correct 371 ms 2040 KB Output is correct
4 Correct 545 ms 3960 KB Output is correct
5 Correct 528 ms 3232 KB Output is correct

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 52 ms 3692 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 76 ms 3760 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 52 ms 3576 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 76 ms 3616 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 51 ms 3688 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 74 ms 3696 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 51 ms 3576 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 74 ms 3804 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 51 ms 3576 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 74 ms 3676 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -