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Submission #973162

# Submission time Handle Problem Language Result Execution time Memory
973162 2024-05-01T14:54:34 Z jadai007 Mobile (BOI12_mobile) C++17
0 / 100
 694 ms 44024 KB 
#include<bits/stdc++.h>

using namespace std;

int n;
double L, x[1000100], y[1000100], l = 0, r = 1e9;
vector<pair<double, double>> vc;

bool solve(double mid){
    vc.clear();
    double ans = 0;
    for(int i=1; i<=n; i++) {
        int dis = sqrt(mid*mid - y[i]*y[i]);
        vc.emplace_back(x[i] - dis, x[i] + dis);
    }
    for(auto i: vc) if(i.first <= ans) ans = max(ans, i.second);
    if(ans >= L) return 1;
    else return 0;
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> L;
    for(int i = 1; i<=n; ++i){
        cin >> x[i] >> y[i];
    }
    while(l+0.0001 < r){
        double mid = (l + r) / 2.0;
        if(solve(mid)) r = mid;
        else l = mid + 0.0001;
    }
    cout << fixed << setprecision(6) << l;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2648 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 2652 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 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 2652 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 49 ms 9620 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 43 ms 9408 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 9420 KB Output is correct
2 Correct 44 ms 9680 KB Output is correct
3 Correct 43 ms 9984 KB Output is correct
4 Incorrect 64 ms 10200 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 9936 KB Output is correct
2 Correct 54 ms 9788 KB Output is correct
3 Correct 51 ms 9676 KB Output is correct
4 Incorrect 76 ms 10224 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 67 ms 9932 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 247 ms 21656 KB Output is correct
2 Correct 368 ms 23616 KB Output is correct
3 Correct 268 ms 24004 KB Output is correct
4 Incorrect 321 ms 25444 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 281 ms 25544 KB Output is correct
2 Incorrect 356 ms 23240 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 326 ms 35480 KB Output is correct
2 Correct 369 ms 38348 KB Output is correct
3 Correct 349 ms 37060 KB Output is correct
4 Incorrect 396 ms 39416 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 345 ms 37824 KB Output is correct
2 Incorrect 443 ms 36084 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 378 ms 34912 KB Output is correct
2 Correct 379 ms 37376 KB Output is correct
3 Correct 386 ms 38632 KB Output is correct
4 Incorrect 449 ms 40156 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 380 ms 37476 KB Output is correct
2 Incorrect 503 ms 37848 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 436 ms 35708 KB Output is correct
2 Correct 437 ms 39404 KB Output is correct
3 Correct 443 ms 38964 KB Output is correct
4 Incorrect 545 ms 40196 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 458 ms 40652 KB Output is correct
2 Incorrect 554 ms 37572 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 489 ms 37316 KB Output is correct
2 Correct 567 ms 42616 KB Output is correct
3 Correct 567 ms 41344 KB Output is correct
4 Incorrect 660 ms 44024 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 581 ms 41500 KB Output is correct
2 Incorrect 694 ms 41672 KB Output isn't correct
3 Halted 0 ms 0 KB -