답안 #949750

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
949750	2024-03-19T15:49:50 Z	Kavelmydex	Mobile (BOI12_mobile)	C++17	100 / 100	419 ms	61800 KB

mobile

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pi pair<int,int>
#define vi vector<int>
#define rep(i,x,n) for(int i=x; i<n; ++i)
#define For(i,n) rep(i,0,n)
#define endl "\n"
#define sp ' '
#define pb push_back
#define f first
#define s second
#define sz size()
#define all(x) (x).begin(),(x).end()
 
const int N = 4e5+10, OO = 1e18, mod = 1e9, mx = 2e6;
void tr(int a, int b){cout << a << sp << b << endl;}
void cmx(double &a, double b){a = max(a,b);}
void cmn(double &a, double b){a = min(a,b);}

int n,l; 
bool in(int x){return 0<=x && x<=l;}
vector <pi> inp,v;
bool ok(double m){
    double mx = 0;
    For(i,n){
        auto [x,y] = v[i];
        if(y > m) continue;
        double d = sqrt(m * m - y * y);
        if(x-d <= mx && mx < x+d){
            mx = x+d;
        }
    }
    return mx >= l;   
}
int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> l;
    For(i,n){
        int x,y; cin >> x >> y;
        y = abs(y);
        inp.pb({x,y});
    }   
    For(i,n){
        int j = i, y = inp[i].s;
        while(j < n && inp[i].f == inp[j].f) y = min(y,inp[j].s), j++;
        v.pb({inp[i].f, y});
        i = j-1;
    }   inp.clear();
    n = v.sz;
    double l = 0, r = 1e10;
    For(i,60){
        double m = (l+r)/2;
        if(ok(m)) r = m;
        else l = m;
    }
    cout << fixed << setprecision(4) << r << endl;
    return 0;
}

Subtask #1
4.0 / 4.0

#	결과	메모리	Grader output
1	Correct	344 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	344 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	1 ms	456 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct

Subtask #3
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	856 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	544 KB	Output is correct

Subtask #4
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	604 KB	Output is correct
2	Correct	2 ms	604 KB	Output is correct
3	Correct	1 ms	604 KB	Output is correct
4	Correct	3 ms	604 KB	Output is correct

Subtask #5
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	604 KB	Output is correct
2	Correct	2 ms	604 KB	Output is correct
3	Correct	1 ms	604 KB	Output is correct
4	Correct	2 ms	728 KB	Output is correct

Subtask #6
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	604 KB	Output is correct
2	Correct	3 ms	604 KB	Output is correct
3	Correct	1 ms	604 KB	Output is correct
4	Correct	2 ms	820 KB	Output is correct
5	Correct	1 ms	604 KB	Output is correct

Subtask #7
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	32 ms	6612 KB	Output is correct
2	Correct	22 ms	4564 KB	Output is correct
3	Correct	16 ms	3288 KB	Output is correct
4	Correct	21 ms	5844 KB	Output is correct
5	Correct	6 ms	2012 KB	Output is correct

Subtask #8
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	2520 KB	Output is correct
2	Correct	15 ms	3796 KB	Output is correct
3	Correct	21 ms	5844 KB	Output is correct
4	Correct	23 ms	6036 KB	Output is correct
5	Correct	24 ms	6356 KB	Output is correct

Subtask #9
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	28 ms	4820 KB	Output is correct
2	Correct	25 ms	3540 KB	Output is correct
3	Correct	25 ms	5588 KB	Output is correct
4	Correct	28 ms	6864 KB	Output is correct
5	Correct	15 ms	3540 KB	Output is correct

Subtask #10
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	3540 KB	Output is correct
2	Correct	23 ms	5000 KB	Output is correct
3	Correct	14 ms	3540 KB	Output is correct
4	Correct	31 ms	6868 KB	Output is correct
5	Correct	25 ms	6352 KB	Output is correct

Subtask #11
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	35 ms	5076 KB	Output is correct
2	Correct	22 ms	5060 KB	Output is correct
3	Correct	15 ms	3544 KB	Output is correct
4	Correct	29 ms	6952 KB	Output is correct
5	Correct	25 ms	6352 KB	Output is correct

Subtask #12
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	177 ms	21940 KB	Output is correct
2	Correct	70 ms	8908 KB	Output is correct
3	Correct	73 ms	12992 KB	Output is correct
4	Correct	130 ms	31156 KB	Output is correct
5	Correct	117 ms	27696 KB	Output is correct

Subtask #13
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	77 ms	9924 KB	Output is correct
2	Correct	255 ms	27064 KB	Output is correct
3	Correct	77 ms	17532 KB	Output is correct
4	Correct	132 ms	31156 KB	Output is correct
5	Correct	121 ms	28852 KB	Output is correct

Subtask #14
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	194 ms	35624 KB	Output is correct
2	Correct	95 ms	17588 KB	Output is correct
3	Correct	85 ms	25328 KB	Output is correct
4	Correct	175 ms	48552 KB	Output is correct
5	Correct	134 ms	33344 KB	Output is correct

Subtask #15
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	124 ms	18100 KB	Output is correct
2	Correct	297 ms	43772 KB	Output is correct
3	Correct	87 ms	24756 KB	Output is correct
4	Correct	211 ms	48752 KB	Output is correct
5	Correct	171 ms	45468 KB	Output is correct

Subtask #16
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	232 ms	37264 KB	Output is correct
2	Correct	102 ms	18780 KB	Output is correct
3	Correct	99 ms	25416 KB	Output is correct
4	Correct	227 ms	51764 KB	Output is correct
5	Correct	137 ms	35556 KB	Output is correct

Subtask #17
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	104 ms	18164 KB	Output is correct
2	Correct	309 ms	48056 KB	Output is correct
3	Correct	121 ms	24504 KB	Output is correct
4	Correct	186 ms	50092 KB	Output is correct
5	Correct	177 ms	47036 KB	Output is correct

Subtask #18
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	251 ms	38700 KB	Output is correct
2	Correct	110 ms	17848 KB	Output is correct
3	Correct	124 ms	26324 KB	Output is correct
4	Correct	214 ms	56272 KB	Output is correct
5	Correct	192 ms	40364 KB	Output is correct

Subtask #19
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	114 ms	17596 KB	Output is correct
2	Correct	367 ms	51676 KB	Output is correct
3	Correct	117 ms	26820 KB	Output is correct
4	Correct	245 ms	55980 KB	Output is correct
5	Correct	194 ms	50856 KB	Output is correct

Subtask #20
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	308 ms	40768 KB	Output is correct
2	Correct	139 ms	17080 KB	Output is correct
3	Correct	133 ms	31504 KB	Output is correct
4	Correct	280 ms	61800 KB	Output is correct
5	Correct	192 ms	45376 KB	Output is correct

Subtask #21
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	141 ms	17076 KB	Output is correct
2	Correct	419 ms	54188 KB	Output is correct
3	Correct	145 ms	36112 KB	Output is correct
4	Correct	286 ms	60072 KB	Output is correct
5	Correct	257 ms	57516 KB	Output is correct

답안 #949750

Compilation message