Submission #941390

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
941390	2024-03-08T16:44:06 Z	Kavelmydex	Mobile (BOI12_mobile)	C++17	65 / 100	399 ms	19136 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 pb push_back
#define endl "\n"
#define sp ' '
#define f first
#define s second
#define sz size()
#define all(x) (x).begin(),(x).end()

const int N = 3e5+10, OO = 1e18, mod = 1e9+7;
void tr(int a, int b){cout << a << sp << b << endl;}
void cmx(int &a, int b){a = max(a,b);}
void cmn(int &a, int b){a = min(a,b);}

vector <pi> v;
int n,L;
bool ok(double m){
    double mn = 2e9, mx = -2e9, z = 0;
    For(i,n){
        auto [x,y] = v[i];
        if(y*y > m*m) continue;
        double d = sqrt(m * m - y * y);
        if(x-d <= z && z <= x+d){
            z = x+d;
        }   
        if(x-d < mn) mn = x-d;
        if(mx < x+d) mx = x+d;    
        if(mn <= 0 && L <= mx && z >= L) return 1;
    }
    return 0;
}
int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> L;
    For(i,n){
        int x,y; cin >> x >> y;
        v.pb({x,y});
    }
    double l = 0, r = 1e10;
    For(i,60){
        double m = (l+r)/2;
        if(ok(m)) r = m;
        else l = m;
    }
    assert(r <= 2236067977);
    cout << setprecision(10) << r << endl;
    return 0;
}

Subtask #1
4.0 / 4.0

#	Verdict	Memory	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	348 KB	Output is correct

Subtask #2
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	504 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct

Subtask #3
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct

Subtask #4
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	604 KB	Output is correct
2	Correct	1 ms	604 KB	Output is correct
3	Correct	1 ms	600 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct

Subtask #5
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	604 KB	Output is correct
2	Correct	2 ms	600 KB	Output is correct
3	Correct	2 ms	600 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct

Subtask #6
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	600 KB	Output is correct
2	Correct	1 ms	600 KB	Output is correct
3	Correct	2 ms	608 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	1 ms	604 KB	Output is correct

Subtask #7
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	34 ms	2520 KB	Output is correct
2	Correct	17 ms	2520 KB	Output is correct
3	Correct	11 ms	1500 KB	Output is correct
4	Correct	17 ms	2520 KB	Output is correct
5	Correct	8 ms	1500 KB	Output is correct

Subtask #8
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	14 ms	2520 KB	Output is correct
2	Correct	14 ms	2728 KB	Output is correct
3	Correct	16 ms	2520 KB	Output is correct
4	Correct	22 ms	2600 KB	Output is correct
5	Correct	19 ms	2520 KB	Output is correct

Subtask #9
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	28 ms	2520 KB	Output is correct
2	Correct	19 ms	2772 KB	Output is correct
3	Correct	18 ms	2520 KB	Output is correct
4	Correct	24 ms	2608 KB	Output is correct
5	Correct	17 ms	2516 KB	Output is correct

Subtask #10
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	23 ms	2520 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	47 ms	2520 KB	Output is correct
2	Correct	25 ms	2516 KB	Output is correct
3	Correct	21 ms	2520 KB	Output is correct
4	Correct	25 ms	2520 KB	Output is correct
5	Correct	20 ms	2520 KB	Output is correct

Subtask #12
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	204 ms	9160 KB	Output is correct
2	Incorrect	120 ms	9668 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #13
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	114 ms	8796 KB	Output is correct
2	Correct	237 ms	9156 KB	Output is correct
3	Correct	113 ms	10172 KB	Output is correct
4	Correct	110 ms	10428 KB	Output is correct
5	Correct	111 ms	10432 KB	Output is correct

Subtask #14
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	225 ms	18236 KB	Output is correct
2	Incorrect	138 ms	17084 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	149 ms	17332 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	275 ms	19136 KB	Output is correct
2	Incorrect	160 ms	18688 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	165 ms	17856 KB	Output is correct
2	Correct	303 ms	17936 KB	Output is correct
3	Correct	149 ms	17568 KB	Output is correct
4	Correct	161 ms	18872 KB	Output is correct
5	Correct	138 ms	17544 KB	Output is correct

Subtask #18
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	279 ms	18096 KB	Output is correct
2	Incorrect	189 ms	17848 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #19
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	188 ms	18100 KB	Output is correct
2	Correct	340 ms	18104 KB	Output is correct
3	Correct	166 ms	18624 KB	Output is correct
4	Correct	180 ms	18360 KB	Output is correct
5	Correct	153 ms	18020 KB	Output is correct

Subtask #20
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	362 ms	17388 KB	Output is correct
2	Incorrect	218 ms	18424 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #21
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	266 ms	18876 KB	Output is correct
2	Correct	399 ms	18516 KB	Output is correct
3	Correct	214 ms	17336 KB	Output is correct
4	Correct	239 ms	18312 KB	Output is correct
5	Correct	202 ms	17592 KB	Output is correct

Submission #941390

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