Submission #88193

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
88193	2018-12-04T10:23:25 Z	JustInCase	Mobile (BOI12_mobile)	C++17	60 / 100	1000 ms	132096 KB

mobile

#include <bits/stdc++.h>

const int32_t MAX_N = 1e6;
const double EPS = 1e-6;

int32_t n, l;
std::pair< int32_t, int32_t > points[MAX_N + 5];

bool Check(long double r) {
	std::vector< std::pair< long double, bool > > events(2 * n);

	long double curr = 0;
	for(int32_t i = 0; i < n; i++) {
		if(r * r < (int64_t) points[i].second * points[i].second) {
			continue;
		}

		long double x1 = points[i].first - sqrt(r * r - (int64_t) points[i].second * points[i].second);
		long double x2 = points[i].first + sqrt(r * r - (int64_t) points[i].second * points[i].second);

		if(!(x1 > curr)) {
			curr = std::max(curr, x2);
		}
	}

	if(!(curr < l)) {
		return true;
	}
	else {
		return false;
	}
}

int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr);

	std::cin >> n >> l;

	for(int32_t i = 0; i < n; i++) {
		std::cin >> points[i].first >> points[i].second;
	}

	int64_t low = 1, high = 1e16;
	long double ans;
	while(low <= high) {
		int64_t mid = (low + high) / 2;

		if(Check(mid / 10000.0)) {
			ans = mid / 10000.0;
			high = mid - 1;
		}
		else {
			low = mid + 1;
		}
	}

	std::cout << std::fixed << std::setprecision(7);
	std::cout << ans << '\n';
}

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	348 KB	Output is correct
2	Correct	2 ms	508 KB	Output is correct
3	Correct	2 ms	508 KB	Output is correct
4	Correct	3 ms	616 KB	Output is correct

Subtask #2
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	616 KB	Output is correct
2	Correct	3 ms	616 KB	Output is correct
3	Correct	2 ms	616 KB	Output is correct
4	Correct	2 ms	620 KB	Output is correct

Subtask #3
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	816 KB	Output is correct
2	Correct	5 ms	820 KB	Output is correct
3	Correct	4 ms	820 KB	Output is correct
4	Correct	5 ms	820 KB	Output is correct

Subtask #4
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	924 KB	Output is correct
2	Correct	9 ms	928 KB	Output is correct
3	Correct	9 ms	1128 KB	Output is correct
4	Correct	8 ms	1128 KB	Output is correct

Subtask #5
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	1128 KB	Output is correct
2	Correct	9 ms	1128 KB	Output is correct
3	Correct	8 ms	1128 KB	Output is correct
4	Correct	8 ms	1128 KB	Output is correct

Subtask #6
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	1128 KB	Output is correct
2	Correct	9 ms	1128 KB	Output is correct
3	Correct	8 ms	1128 KB	Output is correct
4	Correct	8 ms	1128 KB	Output is correct
5	Correct	8 ms	1128 KB	Output is correct

Subtask #7
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	104 ms	5924 KB	Output is correct
2	Correct	97 ms	6012 KB	Output is correct
3	Correct	64 ms	6012 KB	Output is correct
4	Correct	81 ms	6012 KB	Output is correct
5	Correct	57 ms	6012 KB	Output is correct

Subtask #8
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	86 ms	6140 KB	Output is correct
2	Correct	77 ms	6140 KB	Output is correct
3	Correct	91 ms	6292 KB	Output is correct
4	Correct	84 ms	6292 KB	Output is correct
5	Correct	95 ms	6752 KB	Output is correct

Subtask #9
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	109 ms	6780 KB	Output is correct
2	Correct	103 ms	6780 KB	Output is correct
3	Correct	124 ms	6780 KB	Output is correct
4	Correct	111 ms	7712 KB	Output is correct
5	Correct	102 ms	7712 KB	Output is correct

Subtask #10
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	145 ms	7712 KB	Output is correct
2	Correct	130 ms	9208 KB	Output is correct
3	Correct	123 ms	10144 KB	Output is correct
4	Correct	116 ms	12208 KB	Output is correct
5	Correct	113 ms	13396 KB	Output is correct

Subtask #11
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	127 ms	13512 KB	Output is correct
2	Correct	132 ms	13512 KB	Output is correct
3	Correct	124 ms	13512 KB	Output is correct
4	Correct	114 ms	13512 KB	Output is correct
5	Correct	123 ms	13512 KB	Output is correct

Subtask #12
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	734 ms	41720 KB	Output is correct
2	Correct	769 ms	49424 KB	Output is correct
3	Correct	758 ms	56600 KB	Output is correct
4	Correct	656 ms	66240 KB	Output is correct
5	Correct	695 ms	73072 KB	Output is correct

Subtask #13
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	776 ms	73072 KB	Output is correct
2	Correct	784 ms	79772 KB	Output is correct
3	Correct	764 ms	85416 KB	Output is correct
4	Correct	672 ms	94920 KB	Output is correct
5	Correct	652 ms	102036 KB	Output is correct

Subtask #14
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	1075 ms	109268 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	1069 ms	109312 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	1075 ms	116332 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	1069 ms	116528 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	1093 ms	123372 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	1053 ms	123372 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	1076 ms	132096 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	1054 ms	132096 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Submission #88193

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