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Submission #906164

# Submission time Handle Problem Language Result Execution time Memory
906164 2024-01-13T15:01:32 Z Nonoze Mobile (BOI12_mobile) C++17
52 / 100
 289 ms 18888 KB 
#include <bits/stdc++.h>
#define sz(x) (int)(x.size())

using namespace std;

int n, L;
vector<pair<double, double>> a;

void solve() {
	cin >> n >> L;
	a.clear();
	for (int i=0; i<n; i++) {
		int x, y; cin >> x >> y;
		if (!a.empty() && x==a.back().first) {
			if (abs(y)<abs(a.back().second)) a.back().second=y;
			continue;
		}
		a.push_back({x, y});
	}
	n=sz(a);
	double l=0, r=1e9;
	while (r-l>0.000999999) {
		double mid=(l+r)/2;
		double borne=0;
		for (int i=0; i<n; i++) {
			if (abs(a[i].second)>mid) continue;
			double x=a[i].first, y=a[i].second;
			double dist=sqrt((double)(mid*mid-y*y));
			if (x-dist<=borne && x+dist>borne) borne=x+dist;
		}
		if (borne>=L) r=mid;
		else l=mid;
	}
	cout << fixed << setprecision(3) << l << endl;
	return;
}


signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	solve();
	return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 344 KB Output is correct

Subtask #2
0 / 4.0

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

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 #4
4.0 / 4.0

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

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 1 ms 344 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2516 KB Output is correct
2 Correct 18 ms 1496 KB Output is correct
3 Correct 13 ms 1604 KB Output is correct
4 Correct 22 ms 2520 KB Output is correct
5 Correct 6 ms 348 KB Output is correct

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 600 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 2516 KB Output is correct
2 Correct 19 ms 1500 KB Output is correct
3 Correct 20 ms 2520 KB Output is correct
4 Correct 26 ms 2772 KB Output is correct
5 Correct 13 ms 1084 KB Output is correct

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 1500 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 2520 KB Output is correct
2 Correct 19 ms 1548 KB Output is correct
3 Incorrect 13 ms 828 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 8924 KB Output is correct
2 Correct 66 ms 592 KB Output is correct
3 Correct 64 ms 816 KB Output is correct
4 Incorrect 107 ms 8896 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 668 KB Output is correct
2 Correct 159 ms 9156 KB Output is correct
3 Correct 80 ms 2508 KB Output is correct
4 Correct 106 ms 9416 KB Output is correct
5 Correct 102 ms 9664 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 139 ms 17848 KB Output is correct
2 Correct 78 ms 680 KB Output is correct
3 Correct 81 ms 596 KB Output is correct
4 Correct 132 ms 17996 KB Output is correct
5 Correct 106 ms 9404 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 572 KB Output is correct
2 Correct 189 ms 18312 KB Output is correct
3 Correct 73 ms 2512 KB Output is correct
4 Correct 134 ms 18208 KB Output is correct
5 Correct 122 ms 17844 KB Output is correct

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 18616 KB Output is correct
2 Correct 89 ms 592 KB Output is correct
3 Correct 85 ms 648 KB Output is correct
4 Incorrect 154 ms 17592 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 560 KB Output is correct
2 Incorrect 208 ms 18616 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 195 ms 18888 KB Output is correct
2 Incorrect 100 ms 544 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 596 KB Output is correct
2 Correct 231 ms 17596 KB Output is correct
3 Correct 102 ms 2504 KB Output is correct
4 Correct 176 ms 18008 KB Output is correct
5 Correct 159 ms 17340 KB Output is correct

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 244 ms 18104 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 135 ms 556 KB Output is correct
2 Correct 289 ms 18360 KB Output is correct
3 Correct 133 ms 6088 KB Output is correct
4 Correct 235 ms 18720 KB Output is correct
5 Correct 205 ms 17248 KB Output is correct