답안 #768938

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
768938	2023-06-28T23:44:01 Z	orcslop	Mobile (BOI12_mobile)	C++17	100 / 100	672 ms	35324 KB

mobile

#include <bits/stdc++.h>
using namespace std;
#define sz(x) (int)(x).size() 

const int MAXN = 1e6; 

int n; 
double l; 
pair<double, double> v[MAXN]; 

bool check(double rad){
    vector<pair<double, double>> intervals; 
    double curr = 0; 
    for(int i = 0; i < n; i++){
        double dist = 0; 
        if(0 <= v[i].first && v[i].first <= l){
            dist = v[i].second; 
        }
        else if(v[i].first < 0){
            dist = sqrt(v[i].first * v[i].first + v[i].second + v[i].second); 
        }
        else {
            dist=sqrt((v[i].first-l) * (v[i].first - l) + v[i].second * v[i].second); 
        }
        if(dist < rad){
            pair<double, double> range; 
            range.first = v[i].first - sqrt(rad * rad - v[i].second * v[i].second);
            range.second = v[i].first + sqrt(rad * rad - v[i].second * v[i].second); 
            if(range.first <= curr) curr = max(curr, range.second); 
            // else return false; 
        }
    }
    return curr >= l; 
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    cin >> n >> l; 
    for(int i = 0; i < n; i++){
        cin >> v[i].first >> v[i].second; 
    }
    // cout << check(5.55); 
    double low = 0, high = (double) 2e9; 
    while (low + 0.00001 < high) {
        double mid = low + (high - low) / 2;
        if (check(mid)) high = mid;
        else low = mid;
    }
    cout << setprecision(15) << low << '\n'; 
    return 0; 
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	1 ms	212 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	328 KB	Output is correct
2	Correct	1 ms	328 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	212 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	340 KB	Output is correct
2	Correct	2 ms	340 KB	Output is correct
3	Correct	2 ms	340 KB	Output is correct
4	Correct	2 ms	340 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	340 KB	Output is correct
2	Correct	3 ms	464 KB	Output is correct
3	Correct	3 ms	340 KB	Output is correct
4	Correct	3 ms	456 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	340 KB	Output is correct
2	Correct	3 ms	404 KB	Output is correct
3	Correct	3 ms	340 KB	Output is correct
4	Correct	3 ms	468 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	340 KB	Output is correct
2	Correct	3 ms	468 KB	Output is correct
3	Correct	3 ms	340 KB	Output is correct
4	Correct	4 ms	412 KB	Output is correct
5	Correct	3 ms	376 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	40 ms	1736 KB	Output is correct
2	Correct	42 ms	2588 KB	Output is correct
3	Correct	27 ms	1792 KB	Output is correct
4	Correct	51 ms	2672 KB	Output is correct
5	Correct	25 ms	1464 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	1764 KB	Output is correct
2	Correct	42 ms	2216 KB	Output is correct
3	Correct	49 ms	2560 KB	Output is correct
4	Correct	55 ms	2676 KB	Output is correct
5	Correct	58 ms	3220 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	38 ms	1796 KB	Output is correct
2	Correct	45 ms	2360 KB	Output is correct
3	Correct	39 ms	2244 KB	Output is correct
4	Correct	66 ms	3784 KB	Output is correct
5	Correct	52 ms	2556 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	58 ms	2136 KB	Output is correct
2	Correct	54 ms	3272 KB	Output is correct
3	Correct	49 ms	2900 KB	Output is correct
4	Correct	66 ms	3820 KB	Output is correct
5	Correct	59 ms	3100 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	54 ms	2012 KB	Output is correct
2	Correct	54 ms	2128 KB	Output is correct
3	Correct	45 ms	2252 KB	Output is correct
4	Correct	66 ms	3736 KB	Output is correct
5	Correct	60 ms	3064 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	219 ms	8284 KB	Output is correct
2	Correct	276 ms	9104 KB	Output is correct
3	Correct	273 ms	12504 KB	Output is correct
4	Correct	339 ms	12584 KB	Output is correct
5	Correct	302 ms	14884 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	279 ms	8392 KB	Output is correct
2	Correct	261 ms	8392 KB	Output is correct
3	Correct	222 ms	13776 KB	Output is correct
4	Correct	330 ms	17480 KB	Output is correct
5	Correct	311 ms	15440 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	258 ms	9896 KB	Output is correct
2	Correct	339 ms	14184 KB	Output is correct
3	Correct	332 ms	18364 KB	Output is correct
4	Correct	399 ms	21612 KB	Output is correct
5	Correct	359 ms	17612 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	330 ms	9956 KB	Output is correct
2	Correct	312 ms	9984 KB	Output is correct
3	Correct	300 ms	16636 KB	Output is correct
4	Correct	394 ms	21372 KB	Output is correct
5	Correct	378 ms	18420 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	298 ms	11604 KB	Output is correct
2	Correct	410 ms	15920 KB	Output is correct
3	Correct	380 ms	21328 KB	Output is correct
4	Correct	463 ms	24968 KB	Output is correct
5	Correct	416 ms	20188 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	390 ms	11524 KB	Output is correct
2	Correct	389 ms	11436 KB	Output is correct
3	Correct	364 ms	19620 KB	Output is correct
4	Correct	506 ms	24668 KB	Output is correct
5	Correct	427 ms	21324 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	342 ms	13008 KB	Output is correct
2	Correct	465 ms	17208 KB	Output is correct
3	Correct	437 ms	24480 KB	Output is correct
4	Correct	544 ms	28496 KB	Output is correct
5	Correct	497 ms	24004 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	446 ms	13232 KB	Output is correct
2	Correct	411 ms	13220 KB	Output is correct
3	Correct	359 ms	22376 KB	Output is correct
4	Correct	547 ms	28324 KB	Output is correct
5	Correct	496 ms	24380 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	464 ms	16212 KB	Output is correct
2	Correct	558 ms	20544 KB	Output is correct
3	Correct	560 ms	30432 KB	Output is correct
4	Correct	666 ms	35264 KB	Output is correct
5	Correct	614 ms	29496 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	589 ms	16244 KB	Output is correct
2	Correct	511 ms	16592 KB	Output is correct
3	Correct	454 ms	28264 KB	Output is correct
4	Correct	672 ms	35324 KB	Output is correct
5	Correct	611 ms	30660 KB	Output is correct

답안 #768938

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