답안 #88198 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
88198	2018-12-04T10:30:01 Z	JustInCase	Mobile (BOI12_mobile)	C++17	100 / 100	480 ms	62208 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(double r) {
	double curr = 0;
	for(int32_t i = 0; i < n; i++) {
		if(r * r < (int64_t) points[i].second * points[i].second) {
			continue;
		}

		double x1 = points[i].first - sqrt(r * r - (int64_t) points[i].second * points[i].second);
		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 = 1e14;
	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

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	3 ms	504 KB	Output is correct
3	Correct	2 ms	504 KB	Output is correct
4	Correct	2 ms	540 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	540 KB	Output is correct
2	Correct	3 ms	568 KB	Output is correct
3	Correct	2 ms	592 KB	Output is correct
4	Correct	2 ms	600 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	640 KB	Output is correct
2	Correct	3 ms	656 KB	Output is correct
3	Correct	3 ms	680 KB	Output is correct
4	Correct	3 ms	692 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	732 KB	Output is correct
2	Correct	5 ms	772 KB	Output is correct
3	Correct	4 ms	840 KB	Output is correct
4	Correct	5 ms	880 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	952 KB	Output is correct
2	Correct	4 ms	1020 KB	Output is correct
3	Correct	4 ms	1092 KB	Output is correct
4	Correct	4 ms	1100 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	1116 KB	Output is correct
2	Correct	4 ms	1296 KB	Output is correct
3	Correct	4 ms	1296 KB	Output is correct
4	Correct	4 ms	1296 KB	Output is correct
5	Correct	4 ms	1296 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	2284 KB	Output is correct
2	Correct	34 ms	3332 KB	Output is correct
3	Correct	21 ms	3332 KB	Output is correct
4	Correct	30 ms	3332 KB	Output is correct
5	Correct	18 ms	3332 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	29 ms	3664 KB	Output is correct
2	Correct	27 ms	4036 KB	Output is correct
3	Correct	32 ms	4216 KB	Output is correct
4	Correct	33 ms	4216 KB	Output is correct
5	Correct	35 ms	4216 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	42 ms	4292 KB	Output is correct
2	Correct	38 ms	4344 KB	Output is correct
3	Correct	33 ms	4344 KB	Output is correct
4	Correct	40 ms	4348 KB	Output is correct
5	Correct	34 ms	4348 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	44 ms	4348 KB	Output is correct
2	Correct	41 ms	5752 KB	Output is correct
3	Correct	38 ms	6904 KB	Output is correct
4	Correct	41 ms	8700 KB	Output is correct
5	Correct	38 ms	10016 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	45 ms	10016 KB	Output is correct
2	Correct	44 ms	10016 KB	Output is correct
3	Correct	39 ms	10248 KB	Output is correct
4	Correct	41 ms	10248 KB	Output is correct
5	Correct	39 ms	10756 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	193 ms	14584 KB	Output is correct
2	Correct	223 ms	16828 KB	Output is correct
3	Correct	212 ms	16828 KB	Output is correct
4	Correct	191 ms	16828 KB	Output is correct
5	Correct	189 ms	16828 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	225 ms	17176 KB	Output is correct
2	Correct	265 ms	17176 KB	Output is correct
3	Correct	186 ms	17176 KB	Output is correct
4	Correct	198 ms	17176 KB	Output is correct
5	Correct	190 ms	17176 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	238 ms	17860 KB	Output is correct
2	Correct	258 ms	21032 KB	Output is correct
3	Correct	256 ms	21032 KB	Output is correct
4	Correct	242 ms	23756 KB	Output is correct
5	Correct	224 ms	23828 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	258 ms	23828 KB	Output is correct
2	Correct	309 ms	23980 KB	Output is correct
3	Correct	223 ms	23980 KB	Output is correct
4	Correct	230 ms	23980 KB	Output is correct
5	Correct	225 ms	23980 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	282 ms	24616 KB	Output is correct
2	Correct	292 ms	24616 KB	Output is correct
3	Correct	297 ms	24616 KB	Output is correct
4	Correct	267 ms	24708 KB	Output is correct
5	Correct	258 ms	24708 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	306 ms	24708 KB	Output is correct
2	Correct	333 ms	24708 KB	Output is correct
3	Correct	265 ms	24708 KB	Output is correct
4	Correct	263 ms	24708 KB	Output is correct
5	Correct	254 ms	24708 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	306 ms	26540 KB	Output is correct
2	Correct	339 ms	26540 KB	Output is correct
3	Correct	340 ms	26692 KB	Output is correct
4	Correct	303 ms	26692 KB	Output is correct
5	Correct	287 ms	26692 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	348 ms	26692 KB	Output is correct
2	Correct	384 ms	26692 KB	Output is correct
3	Correct	296 ms	26692 KB	Output is correct
4	Correct	302 ms	26692 KB	Output is correct
5	Correct	287 ms	26692 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	378 ms	27976 KB	Output is correct
2	Correct	429 ms	27980 KB	Output is correct
3	Correct	415 ms	28080 KB	Output is correct
4	Correct	383 ms	28080 KB	Output is correct
5	Correct	369 ms	28232 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	441 ms	28232 KB	Output is correct
2	Correct	480 ms	28232 KB	Output is correct
3	Correct	397 ms	28232 KB	Output is correct
4	Correct	394 ms	47304 KB	Output is correct
5	Correct	372 ms	62208 KB	Output is correct

답안 #88198

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