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Submission #920753

# Submission time Handle Problem Language Result Execution time Memory
920753 2024-02-03T02:30:25 Z ethanv13 Mobile (BOI12_mobile) C++17
12 / 100
 692 ms 8276 KB 
#include <bits/stdc++.h>
using namespace std;
int main() {
    int n,l;cin>>n>>l;
    vector<pair<int,int>>a(n);
    for(int i=0;i<n;++i){
        cin>>a[i].first>>a[i].second;
    }
    long double lo=0;
    long double hi=4e9;
    long double delta=1e-5;
    while(hi-lo>delta){
        long double mid=(lo+hi)/2;
        long double curr=0;
        for(int i=0;i<n;++i){
            long double dist=sqrt(mid*mid-a[i].second*a[i].second);
            if(a[i].first-dist<=curr){curr=max(a[i].first+dist,curr);}
        }
        if(curr>=l){hi=mid;}else{lo=mid;}
    }
    cout<<fixed<<setprecision(5);
    cout<<lo<<endl;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 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 0 ms 600 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 436 KB Output is correct
4 Correct 1 ms 348 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 392 KB Output is correct
4 Correct 2 ms 600 KB Output is correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 472 KB Output is correct
2 Correct 3 ms 348 KB Output is correct
3 Correct 4 ms 448 KB Output is correct
4 Incorrect 6 ms 600 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 348 KB Output is correct
2 Correct 4 ms 348 KB Output is correct
3 Correct 4 ms 348 KB Output is correct
4 Incorrect 6 ms 520 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 348 KB Output is correct
2 Correct 3 ms 348 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Incorrect 6 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 84 ms 860 KB Output is correct
2 Incorrect 53 ms 1880 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 1028 KB Output is correct
2 Correct 81 ms 1620 KB Output is correct
3 Incorrect 98 ms 2088 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 1112 KB Output is correct
2 Incorrect 53 ms 1064 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 1212 KB Output is correct
2 Incorrect 65 ms 1204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 1204 KB Output is correct
2 Incorrect 64 ms 1116 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 4184 KB Output is correct
2 Incorrect 335 ms 4432 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 339 ms 4336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 334 ms 5204 KB Output is correct
2 Incorrect 400 ms 5112 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 413 ms 5116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 376 ms 5724 KB Output is correct
2 Incorrect 465 ms 5916 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 483 ms 5904 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 439 ms 6688 KB Output is correct
2 Incorrect 544 ms 6684 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 547 ms 6740 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 545 ms 8248 KB Output is correct
2 Incorrect 676 ms 8276 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 692 ms 8276 KB Output isn't correct
2 Halted 0 ms 0 KB -