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Submission #906167

# Submission time Handle Problem Language Result Execution time Memory
906167 2024-01-13T15:07:12 Z Ludissey Mobile (BOI12_mobile) C++14
100 / 100
 409 ms 10628 KB 
#include <bits/stdc++.h>
using namespace std;
 
double dist(double x1, double y1, double x2, double y2){
    double dist=sqrt(pow((x1-x2),2)+pow((y1-y2),2));
    return dist;
}

signed main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    int N,L; cin >> N >> L;
    vector<pair<int,int>> a;
    for (int i = 0; i < N; i++){
        int x,y; cin >> x >> y;
        y=abs(y);
        if(i>0&&a[a.size()-1].first==x) a[a.size()-1].second=min(a[a.size()-1].second,y);
        else{
            a.push_back({x,y});
        }
    }
    N=a.size();
    double l=0,r=1e9;
    while(r-l>0.0009){
        double mid=(l+r)/2;
        double rght=0;
        for (int i = 0; i < a.size(); i++)
        {
            if(mid<(double)a[i].second) continue;
            double pnt1=a[i].first-sqrt((mid*mid)-((double)a[i].second*(double)a[i].second)),pnt2=(double)a[i].first+sqrt((mid*mid)-((double)a[i].second*(double)a[i].second));
            if(pnt1<=rght) rght=max(rght, pnt2);
        }
        if(rght>=L) {
            r=mid;
        }else{
            l=mid;
        }
    }
    cout << setprecision(3) << fixed << l << "\n";
    return 0;
}

Compilation message

mobile.cpp: In function 'int main()':
mobile.cpp:26:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         for (int i = 0; i < a.size(); i++)
      |                         ~~^~~~~~~~~~

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 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 600 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 2 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 2 ms 344 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 2 ms 520 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 2 ms 380 KB Output is correct

Subtask #5
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 3 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 3 ms 516 KB Output is correct

Subtask #6
5.0 / 5.0

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

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 1500 KB Output is correct
2 Correct 25 ms 988 KB Output is correct
3 Correct 18 ms 988 KB Output is correct
4 Correct 22 ms 1500 KB Output is correct
5 Correct 6 ms 344 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 17 ms 1028 KB Output is correct
3 Correct 25 ms 1500 KB Output is correct
4 Correct 23 ms 1752 KB Output is correct
5 Correct 22 ms 1500 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 1500 KB Output is correct
2 Correct 25 ms 988 KB Output is correct
3 Correct 25 ms 1500 KB Output is correct
4 Correct 24 ms 1500 KB Output is correct
5 Correct 15 ms 604 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 988 KB Output is correct
2 Correct 24 ms 992 KB Output is correct
3 Correct 15 ms 604 KB Output is correct
4 Correct 31 ms 1496 KB Output is correct
5 Correct 29 ms 1500 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 1500 KB Output is correct
2 Correct 24 ms 992 KB Output is correct
3 Correct 15 ms 600 KB Output is correct
4 Correct 24 ms 1496 KB Output is correct
5 Correct 35 ms 1496 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 5520 KB Output is correct
2 Correct 73 ms 592 KB Output is correct
3 Correct 74 ms 592 KB Output is correct
4 Correct 116 ms 5008 KB Output is correct
5 Correct 124 ms 6600 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 516 KB Output is correct
2 Correct 214 ms 6276 KB Output is correct
3 Correct 75 ms 1492 KB Output is correct
4 Correct 115 ms 5836 KB Output is correct
5 Correct 123 ms 6072 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 203 ms 10268 KB Output is correct
2 Correct 92 ms 508 KB Output is correct
3 Correct 76 ms 800 KB Output is correct
4 Correct 140 ms 10628 KB Output is correct
5 Correct 143 ms 4572 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 604 KB Output is correct
2 Correct 250 ms 10436 KB Output is correct
3 Correct 78 ms 1492 KB Output is correct
4 Correct 138 ms 9284 KB Output is correct
5 Correct 147 ms 9312 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 237 ms 10180 KB Output is correct
2 Correct 92 ms 552 KB Output is correct
3 Correct 100 ms 344 KB Output is correct
4 Correct 190 ms 9148 KB Output is correct
5 Correct 167 ms 5780 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 93 ms 348 KB Output is correct
2 Correct 291 ms 8900 KB Output is correct
3 Correct 108 ms 1524 KB Output is correct
4 Correct 165 ms 10432 KB Output is correct
5 Correct 178 ms 10576 KB Output is correct

Subtask #18
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 273 ms 9404 KB Output is correct
2 Correct 101 ms 348 KB Output is correct
3 Correct 106 ms 600 KB Output is correct
4 Correct 181 ms 10376 KB Output is correct
5 Correct 186 ms 5068 KB Output is correct

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 107 ms 496 KB Output is correct
2 Correct 316 ms 9192 KB Output is correct
3 Correct 117 ms 1496 KB Output is correct
4 Correct 181 ms 10056 KB Output is correct
5 Correct 192 ms 9664 KB Output is correct

Subtask #20
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 333 ms 8900 KB Output is correct
2 Correct 154 ms 592 KB Output is correct
3 Correct 149 ms 348 KB Output is correct
4 Correct 233 ms 9548 KB Output is correct
5 Correct 209 ms 5540 KB Output is correct

Subtask #21
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 132 ms 344 KB Output is correct
2 Correct 409 ms 10332 KB Output is correct
3 Correct 143 ms 2508 KB Output is correct
4 Correct 224 ms 9920 KB Output is correct
5 Correct 252 ms 9248 KB Output is correct