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답안 #948286

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
948286 2024-03-18T03:25:25 Z Amaarsaa Mobile (BOI12_mobile) C++14
0 / 100
 313 ms 16088 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 * R - y[j] * 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 = 1.5e9;
	
	while (hi - lo > 1e-3) {
 		mid = (lo + hi)/2;
		if (!Can(mid)) lo = mid;
		else hi = mid;
	}	
	cout << fixed << setprecision(4) << lo << "\n";
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2392 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 2396 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 1 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 2 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 2392 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 23 ms 7004 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 20 ms 6748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 6748 KB Output is correct
2 Incorrect 18 ms 6748 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

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

Subtask #11
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 6716 KB Output is correct
2 Incorrect 20 ms 6792 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 111 ms 10972 KB Output is correct
2 Correct 98 ms 10832 KB Output is correct
3 Correct 94 ms 10632 KB Output is correct
4 Incorrect 152 ms 10884 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 109 ms 10880 KB Output is correct
2 Incorrect 181 ms 10880 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 130 ms 14928 KB Output is correct
2 Incorrect 119 ms 14740 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 119 ms 14932 KB Output is correct
2 Incorrect 207 ms 14976 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 152 ms 14932 KB Output is correct
2 Incorrect 130 ms 14980 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 159 ms 15236 KB Output is correct
2 Incorrect 234 ms 14984 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 172 ms 14932 KB Output is correct
2 Incorrect 188 ms 14984 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 153 ms 14932 KB Output is correct
2 Incorrect 264 ms 14932 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 212 ms 16008 KB Output is correct
2 Incorrect 204 ms 15952 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 189 ms 16088 KB Output is correct
2 Incorrect 313 ms 15988 KB Output isn't correct
3 Halted 0 ms 0 KB -