답안 #491765

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
491765	2021-12-04T09:48:19 Z	dooompy	Mobile (BOI12_mobile)	C++17	100 / 100	429 ms	35416 KB

mobile

#include "bits/stdc++.h"

using namespace std;

using ll = long long;

ll x[1000005], y[1000005];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
//    freopen("", "r", stdin);
//    freopen("", "w", stdout);
    int n, l; cin >> n >> l;
    for (int i = 0; i < n; i++) {
        cin >> x[i] >> y[i];
    }
    double lo = 1, hi = 1.5e9;

    while (hi-lo > 1e-4) {
        double mid = (hi + lo) / 2;
        double t = 0;

        for (int i = 0; i < n; i++) {
            double length = sqrt(mid * mid - y[i] * y[i]);
            double left = x[i] - length;
            double right = x[i] + length;
            if (left <= t) {
                t = max(t, right);
            }
        }

        if (t >= l) {
            hi = mid;
        } else {
            lo = mid;
        }
    }

    cout << fixed << setprecision(10) << lo << "\n";
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	280 KB	Output is correct
4	Correct	0 ms	204 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	204 KB	Output is correct
2	Correct	204 KB	Output is correct
3	Correct	204 KB	Output is correct
4	Correct	204 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	332 KB	Output is correct
2	Correct	2 ms	460 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	2 ms	460 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	332 KB	Output is correct
2	Correct	2 ms	460 KB	Output is correct
3	Correct	2 ms	360 KB	Output is correct
4	Correct	3 ms	460 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	332 KB	Output is correct
2	Correct	2 ms	460 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	2 ms	460 KB	Output is correct
5	Correct	2 ms	332 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	29 ms	2252 KB	Output is correct
2	Correct	22 ms	2508 KB	Output is correct
3	Correct	15 ms	1740 KB	Output is correct
4	Correct	29 ms	2680 KB	Output is correct
5	Correct	13 ms	1512 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	2276 KB	Output is correct
2	Correct	25 ms	2172 KB	Output is correct
3	Correct	30 ms	2508 KB	Output is correct
4	Correct	28 ms	2740 KB	Output is correct
5	Correct	35 ms	3144 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	2392 KB	Output is correct
2	Correct	24 ms	2688 KB	Output is correct
3	Correct	34 ms	2512 KB	Output is correct
4	Correct	40 ms	3792 KB	Output is correct
5	Correct	28 ms	2524 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	31 ms	3392 KB	Output is correct
2	Correct	29 ms	3220 KB	Output is correct
3	Correct	34 ms	2868 KB	Output is correct
4	Correct	41 ms	3788 KB	Output is correct
5	Correct	41 ms	3148 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	31 ms	3272 KB	Output is correct
2	Correct	30 ms	3232 KB	Output is correct
3	Correct	30 ms	2908 KB	Output is correct
4	Correct	42 ms	3836 KB	Output is correct
5	Correct	36 ms	3140 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	125 ms	12384 KB	Output is correct
2	Correct	148 ms	15868 KB	Output is correct
3	Correct	145 ms	15372 KB	Output is correct
4	Correct	201 ms	17840 KB	Output is correct
5	Correct	172 ms	14916 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	145 ms	16348 KB	Output is correct
2	Correct	226 ms	14752 KB	Output is correct
3	Correct	140 ms	13780 KB	Output is correct
4	Correct	192 ms	17476 KB	Output is correct
5	Correct	176 ms	15368 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	143 ms	14788 KB	Output is correct
2	Correct	185 ms	18924 KB	Output is correct
3	Correct	167 ms	18360 KB	Output is correct
4	Correct	238 ms	21572 KB	Output is correct
5	Correct	206 ms	17716 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	186 ms	19536 KB	Output is correct
2	Correct	262 ms	17620 KB	Output is correct
3	Correct	185 ms	16672 KB	Output is correct
4	Correct	245 ms	21448 KB	Output is correct
5	Correct	253 ms	18436 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	188 ms	17328 KB	Output is correct
2	Correct	228 ms	22116 KB	Output is correct
3	Correct	208 ms	21316 KB	Output is correct
4	Correct	307 ms	24872 KB	Output is correct
5	Correct	252 ms	20292 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	230 ms	22784 KB	Output is correct
2	Correct	324 ms	20528 KB	Output is correct
3	Correct	198 ms	19576 KB	Output is correct
4	Correct	281 ms	24552 KB	Output is correct
5	Correct	268 ms	21412 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	198 ms	19652 KB	Output is correct
2	Correct	237 ms	25284 KB	Output is correct
3	Correct	239 ms	24452 KB	Output is correct
4	Correct	325 ms	28412 KB	Output is correct
5	Correct	292 ms	23996 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	247 ms	25924 KB	Output is correct
2	Correct	350 ms	23472 KB	Output is correct
3	Correct	223 ms	22372 KB	Output is correct
4	Correct	317 ms	28272 KB	Output is correct
5	Correct	281 ms	24500 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	236 ms	24644 KB	Output is correct
2	Correct	294 ms	31504 KB	Output is correct
3	Correct	285 ms	30544 KB	Output is correct
4	Correct	394 ms	35132 KB	Output is correct
5	Correct	363 ms	29540 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	293 ms	32484 KB	Output is correct
2	Correct	429 ms	29204 KB	Output is correct
3	Correct	296 ms	28228 KB	Output is correct
4	Correct	414 ms	35416 KB	Output is correct
5	Correct	361 ms	30704 KB	Output is correct

답안 #491765

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