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Submission #781090

# Submission time Handle Problem Language Result Execution time Memory
781090 2023-07-12T17:30:56 Z uped Mobile (BOI12_mobile) C++14
12 / 100
 425 ms 23664 KB 
#include<bits/stdc++.h>

using namespace std;

using ll = long long;

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fastio();
    int n, len;
    cin >> n >> len;
    vector<pair<int, int>> v(n);
    for (int i = 0; i < n; ++i) {
        int a, b;
        cin >> a >> b;
        v[i] = {a, b};
    }
    double l = 0.0, r = 1e10;
    for (int i = 0; i < 100; ++i) {
        double radius = (l + r) / 2.0;
        double cur = 0;
        for (int j = 0; j < n; ++j) {
            int x = v[j].first;
            int y= v[j].second;
            double a = sqrt( radius * radius - y * y);
            if (x - a <= cur) cur = max(x + a, cur);
        }
        if (cur >= len) {
            r = radius;
        } else {
            l = radius;
        }
    }
    cout << setprecision(20) << r;
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 324 KB Output is correct
4 Correct 0 ms 212 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 4 ms 400 KB Output is correct
4 Incorrect 5 ms 328 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 360 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 3 ms 332 KB Output is correct
4 Incorrect 4 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Incorrect 4 ms 432 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 852 KB Output is correct
2 Incorrect 31 ms 2004 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 852 KB Output is correct
2 Correct 45 ms 852 KB Output is correct
3 Incorrect 74 ms 852 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 980 KB Output is correct
2 Incorrect 33 ms 2132 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 1108 KB Output is correct
2 Incorrect 41 ms 2508 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 1108 KB Output is correct
2 Incorrect 40 ms 1108 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 190 ms 4180 KB Output is correct
2 Incorrect 203 ms 11896 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 205 ms 4304 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 233 ms 4948 KB Output is correct
2 Incorrect 244 ms 14224 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 270 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 264 ms 5716 KB Output is correct
2 Incorrect 285 ms 16544 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 293 ms 5716 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 306 ms 6484 KB Output is correct
2 Incorrect 357 ms 18904 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 326 ms 6484 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 375 ms 8148 KB Output is correct
2 Incorrect 406 ms 23664 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 425 ms 8148 KB Output isn't correct
2 Halted 0 ms 0 KB -