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Submission #633261

# Submission time Handle Problem Language Result Execution time Memory
633261 2022-08-22T02:46:33 Z afatpotato Mobile (BOI12_mobile) C++14
80 / 100
 1000 ms 28436 KB 
#include <bits/stdc++.h>

using namespace std;



vector<pair<double, double> > tower;
long long n, l;

int main() {
    cin >> n >> l;
    tower.resize(n);
    for (int i = 0; i < n; i++) {
        cin >> tower[i].first >> tower[i].second;
    }
    sort(tower.begin(), tower.end());
    double low = 0;
    double high = 4e9;
    double ans = 0;

    while (high - low > 1e-3) {
        double mid = (low + high) / 2;
        double cur = 0;
        for (int i = 0; i < n; i++) {
            double delta = sqrt(mid * mid - tower[i].second * tower[i].second);
            double a = tower[i].first - delta;
            double b = tower[i].first + delta;
            if (a <= cur) {
                cur = max(cur, b);
            }
        }
        if (cur > l) {
            ans = mid;
            high = mid;
        } else {
            low = mid;
        }
    }
    cout << fixed;
    cout << setprecision(9);
    cout << ans << endl;
}

Subtask #1
4.0 / 4.0

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

Subtask #2
4.0 / 4.0

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

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 340 KB Output is correct
2 Correct 6 ms 372 KB Output is correct
3 Correct 4 ms 340 KB Output is correct
4 Correct 7 ms 340 KB Output is correct

Subtask #5
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 340 KB Output is correct
2 Correct 6 ms 340 KB Output is correct
3 Correct 5 ms 340 KB Output is correct
4 Correct 6 ms 376 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 340 KB Output is correct
2 Correct 5 ms 340 KB Output is correct
3 Correct 5 ms 340 KB Output is correct
4 Correct 6 ms 340 KB Output is correct
5 Correct 5 ms 340 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 1472 KB Output is correct
2 Correct 85 ms 1492 KB Output is correct
3 Correct 52 ms 1132 KB Output is correct
4 Correct 91 ms 1468 KB Output is correct
5 Correct 43 ms 980 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 1520 KB Output is correct
2 Correct 73 ms 1396 KB Output is correct
3 Correct 91 ms 1564 KB Output is correct
4 Correct 95 ms 1492 KB Output is correct
5 Correct 110 ms 1620 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 1660 KB Output is correct
2 Correct 94 ms 1580 KB Output is correct
3 Correct 80 ms 1620 KB Output is correct
4 Correct 139 ms 1848 KB Output is correct
5 Correct 94 ms 1684 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 111 ms 1856 KB Output is correct
2 Correct 108 ms 1852 KB Output is correct
3 Correct 92 ms 1748 KB Output is correct
4 Correct 139 ms 1860 KB Output is correct
5 Correct 118 ms 1748 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 126 ms 1856 KB Output is correct
2 Correct 105 ms 1748 KB Output is correct
3 Correct 96 ms 1856 KB Output is correct
4 Correct 149 ms 1856 KB Output is correct
5 Correct 111 ms 1852 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 436 ms 8112 KB Output is correct
2 Correct 570 ms 8112 KB Output is correct
3 Correct 537 ms 8116 KB Output is correct
4 Correct 702 ms 8148 KB Output is correct
5 Correct 558 ms 8116 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 591 ms 8116 KB Output is correct
2 Correct 652 ms 8124 KB Output is correct
3 Correct 488 ms 8132 KB Output is correct
4 Correct 716 ms 8120 KB Output is correct
5 Correct 616 ms 8020 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 564 ms 9684 KB Output is correct
2 Correct 768 ms 9684 KB Output is correct
3 Correct 686 ms 9684 KB Output is correct
4 Correct 870 ms 9688 KB Output is correct
5 Correct 671 ms 9684 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 699 ms 9684 KB Output is correct
2 Correct 737 ms 9684 KB Output is correct
3 Correct 610 ms 9684 KB Output is correct
4 Correct 837 ms 9684 KB Output is correct
5 Correct 732 ms 9684 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 607 ms 11244 KB Output is correct
2 Correct 828 ms 11248 KB Output is correct
3 Correct 761 ms 11244 KB Output is correct
4 Correct 972 ms 11256 KB Output is correct
5 Correct 781 ms 20300 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 830 ms 11252 KB Output is correct
2 Correct 833 ms 11220 KB Output is correct
3 Correct 701 ms 11248 KB Output is correct
4 Correct 959 ms 11248 KB Output is correct
5 Correct 829 ms 11252 KB Output is correct

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 720 ms 12816 KB Output is correct
2 Correct 910 ms 12812 KB Output is correct
3 Correct 958 ms 24348 KB Output is correct
4 Execution timed out 1080 ms 28436 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 950 ms 12820 KB Output is correct
2 Correct 948 ms 12876 KB Output is correct
3 Correct 795 ms 12816 KB Output is correct
4 Execution timed out 1080 ms 12756 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 880 ms 15956 KB Output is correct
2 Execution timed out 1091 ms 15956 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 1097 ms 15956 KB Time limit exceeded
2 Halted 0 ms 0 KB -