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답안 #948284

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
948284 2024-03-18T03:22:43 Z Amaarsaa Mobile (BOI12_mobile) C++14
0 / 100
 643 ms 31828 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long ;

ll n, l;
ll x[1000005], y[1000005];
bool Can(double R) {
	double D, x1, x2, mx = 0.0;
	for (int j = 1; j <= n; j ++) {
		D = (R - y[j]) * (R + y[j]);
		D = sqrt(D);
		x1 = x[j] - D;
		x2 = x[j] + D;
		if ( x1 > mx) return false;
		mx = max(mx,x2);
	}
	if ( mx < l) return false;
	return true;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	ll i;
	double lo , hi, mid;
	cin >> n >> l;
	
	for (i = 1; i <= n; i ++) {
		cin >> x[i] >> y[i];
	}
	lo = 0;
	hi = 1e12;
	
	for (i= 1; i <= 100;i ++) {
		mid = (lo + hi)/2;
		if (!Can(mid)) lo = mid;
		else hi = mid;
	}	
	printf("%.4lf", lo);
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Incorrect 0 ms 2396 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2396 KB Output is correct
2 Correct 2 ms 2396 KB Output is correct
3 Incorrect 2 ms 2396 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 54 ms 6776 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 32 ms 7000 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 37 ms 6996 KB Output is correct
2 Incorrect 20 ms 6744 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 26 ms 6748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 6748 KB Output is correct
2 Incorrect 36 ms 8028 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 205 ms 10892 KB Output is correct
2 Correct 178 ms 18604 KB Output is correct
3 Correct 172 ms 18004 KB Output is correct
4 Incorrect 299 ms 20468 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 180 ms 10884 KB Output is correct
2 Incorrect 404 ms 17748 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 238 ms 14984 KB Output is correct
2 Incorrect 151 ms 24044 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 159 ms 15484 KB Output is correct
2 Incorrect 441 ms 22912 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 282 ms 14980 KB Output is correct
2 Incorrect 168 ms 25684 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 169 ms 14984 KB Output is correct
2 Incorrect 511 ms 24664 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 319 ms 14976 KB Output is correct
2 Incorrect 262 ms 27256 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 302 ms 14980 KB Output is correct
2 Incorrect 643 ms 25684 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 401 ms 16088 KB Output is correct
2 Incorrect 357 ms 31828 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 355 ms 16092 KB Output is correct
2 Incorrect 558 ms 29264 KB Output isn't correct
3 Halted 0 ms 0 KB -