Submission #920903

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
920903	2024-02-03T07:31:46 Z	Kams7	Mobile (BOI12_mobile)	C++17	8 / 100	763 ms	94376 KB

mobile

#include <bits/stdc++.h>
using namespace std;
#define ll long long

double dist(double k, ll y){
    return sqrt(k*k - y*y);
}

bool check(ll n, double k, ll l, vector<pair<ll,ll>> v){
    double mn = 0;
    for (ll i=0; i<n; i++){
        ll x = v[i].first, y = v[i].second;
        double d = dist(k, y);
        if (d<=0) continue;
        if (x-d<=mn) mn = max(mn, x+d);
    }
    return mn>=l;
}

void solve(){
    ll n, len; cin >> n >> len;
    map<ll, ll> ys; 
    for (ll i=0; i<n; i++){
        ll x, y; cin >> x >> y;
        if (ys.find(x) == ys.end()) ys[x] = abs(y);
        else ys[x] = min(ys[x], abs(y));
    }
    vector<pair<ll, ll>> v;
    for (auto el: ys){
        v.push_back(make_pair(el.first, el.second));
    }
    sort(v.begin(), v.end());
    n = size(v);
    double l=0, r=1.5e9;
    while (r-l>1e-4){
        double mid = ((l+r)/2);
        if (check(n, mid, len, v)) r=mid;
        else l=mid;
    }
    cout << l << "\n";
}


int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(NULL);
	// your code goes here
	// int t;
	// cin >> t;
	// while (t--) 
    solve();
}

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct

Subtask #2
4.0 / 4.0

#	Verdict	Memory	Grader output
1	Correct	348 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 #3
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	348 KB	Output is correct
2	Correct	1 ms	604 KB	Output is correct
3	Correct	1 ms	344 KB	Output is correct
4	Incorrect	1 ms	604 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #4
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	604 KB	Output is correct
2	Incorrect	4 ms	860 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #5
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	604 KB	Output is correct
2	Incorrect	3 ms	860 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #6
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	860 KB	Output is correct
2	Incorrect	3 ms	860 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #7
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	50 ms	6848 KB	Output is correct
2	Incorrect	37 ms	5828 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #8
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	25 ms	852 KB	Output is correct
2	Correct	41 ms	3780 KB	Output is correct
3	Incorrect	45 ms	6836 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #9
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	59 ms	8640 KB	Output is correct
2	Incorrect	38 ms	5320 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	43 ms	4392 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	55 ms	10220 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	324 ms	47420 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #13
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	152 ms	1488 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	380 ms	58036 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	159 ms	1108 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	455 ms	66432 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	177 ms	852 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	570 ms	77556 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	218 ms	848 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	763 ms	94376 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	261 ms	760 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Submission #920903

Compilation message