Submission #995198

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
995198	2024-06-08T15:38:05 Z	VMaksimoski008	Mobile (BOI12_mobile)	C++17	0 / 100	1000 ms	48964 KB

mobile

#include <bits/stdc++.h>
#define int long long

using namespace std;
using ll = long long;
using pdd = pair<double, double>;

int32_t main() {
    int n, L;
    cin >> n >> L;

    vector<int> x(n), y(n);
    for(int i=0; i<n; i++) cin >> x[i] >> y[i];

    double l=1, r=2e9, ans=r;
    for(int it=0; it<40; it++) {
        double mid = (l + r) / 2.0;
        vector<pdd> seg;

        for(int i=0; i<n; i++) {
            if(abs(y[i]) >= mid) continue;
            double len = sqrt(mid * mid - y[i] * y[i]);
            double left = x[i] - len, right = x[i] + len;
            if( right >= 0 && left <= L ) seg.push_back({ max((double)0, x[i] - len), min((double)L, x[i] + len) });
        }

        if(seg.size() == 0) {
            l = mid;
            continue;
        }

        bool ok = 1;
        double mn = 1e9;
        for(auto &s : seg) mn = min(mn, s.first);
        if(mn > 0) ok = 0;

        double lp=seg[0].first, rp=seg[0].second;

        for(int i=1; i<seg.size(); i++) {
            if(seg[i].first <= rp) rp = max(rp, seg[i].second);
        }

        if(ok && rp >= L) ans = min(ans, mid), r = mid;
        else l = mid;
    }

    cout << setprecision(8) << fixed << ans << '\n';
    return 0;
}

Compilation message

mobile.cpp: In function 'int32_t main()':
mobile.cpp:39:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i=1; i<seg.size(); i++) {
      |                      ~^~~~~~~~~~~
mobile.cpp:37:16: warning: unused variable 'lp' [-Wunused-variable]
   37 |         double lp=seg[0].first, rp=seg[0].second;
      |                ^~

Subtask #1
0 / 4.0

#	Verdict	Memory	Grader output
1	Correct	344 KB	Output is correct
2	Incorrect	348 KB	Output isn't correct
3	Halted	0 KB	-

Subtask #2
0 / 4.0

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

Subtask #3
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	2 ms	344 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #4
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	732 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	728 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #6
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	716 KB	Output is correct
2	Correct	6 ms	716 KB	Output is correct
3	Correct	4 ms	732 KB	Output is correct
4	Incorrect	4 ms	732 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #7
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	61 ms	4872 KB	Output is correct
2	Incorrect	97 ms	4996 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #8
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	80 ms	4988 KB	Output is correct
2	Correct	51 ms	4784 KB	Output is correct
3	Incorrect	58 ms	5068 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #9
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	96 ms	5328 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #10
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	147 ms	5712 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #11
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	75 ms	5540 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #12
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	515 ms	24336 KB	Output is correct
2	Correct	550 ms	24316 KB	Output is correct
3	Correct	567 ms	24320 KB	Output is correct
4	Correct	325 ms	24376 KB	Output is correct
5	Incorrect	329 ms	24340 KB	Output isn't correct
6	Halted	0 ms	0 KB	-

Subtask #13
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	543 ms	24512 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #14
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	625 ms	36996 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #15
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	700 ms	36892 KB	Output is correct
2	Incorrect	513 ms	36692 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #16
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	720 ms	39236 KB	Output is correct
2	Incorrect	797 ms	40632 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #17
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	795 ms	40732 KB	Output is correct
2	Incorrect	518 ms	38980 KB	Output isn't correct
3	Halted	0 ms	0 KB	-

Subtask #18
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	744 ms	42040 KB	Output is correct
2	Correct	883 ms	42360 KB	Output is correct
3	Correct	874 ms	42188 KB	Output is correct
4	Incorrect	497 ms	42992 KB	Output isn't correct
5	Halted	0 ms	0 KB	-

Subtask #19
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	892 ms	42924 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #20
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	936 ms	48188 KB	Output is correct
2	Execution timed out	1002 ms	48964 KB	Time limit exceeded
3	Halted	0 ms	0 KB	-

Subtask #21
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Execution timed out	1026 ms	48252 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-