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Submission #906130

# Submission time Handle Problem Language Result Execution time Memory
906130 2024-01-13T14:29:32 Z Nonoze Mobile (BOI12_mobile) C++17
52 / 100
 553 ms 16212 KB 
#include <bits/stdc++.h>

#define int long long
#define sz(x) (int)(x.size())

using namespace std;

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

long double dist(long double x1, pair<long double, long double> other) {
	long double y1=0;
	long double x2=other.first, y2=other.second;
	return ((long double)sqrt((long double)((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1))));
}

void solve() {
	cin >> n >> L;
	a.clear();
	a.resize(n);
	for (auto &u: a) cin >> u.first >> u.second;
	double l=0, r=1e9;
	while (r-l>=0.001) {
		double mid=(l+r)/2;
		double borne=0;
		for (int i=0; i<n; i++) {
			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 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 #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 1 ms 344 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 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 344 KB Output is correct

Subtask #4
4.0 / 4.0

# 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 Correct 3 ms 348 KB Output is correct

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 344 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 3 ms 348 KB Output is correct
2 Correct 3 ms 536 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Correct 3 ms 348 KB Output is correct
5 Correct 3 ms 348 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 1628 KB Output is correct
2 Correct 36 ms 1796 KB Output is correct
3 Correct 25 ms 1112 KB Output is correct
4 Correct 43 ms 1624 KB Output is correct
5 Correct 22 ms 1252 KB Output is correct

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 44 ms 1624 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 35 ms 1844 KB Output is correct
2 Correct 38 ms 1744 KB Output is correct
3 Correct 38 ms 1796 KB Output is correct
4 Correct 58 ms 1884 KB Output is correct
5 Correct 44 ms 1628 KB Output is correct

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 56 ms 1880 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 2012 KB Output is correct
2 Correct 48 ms 2008 KB Output is correct
3 Incorrect 44 ms 1884 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 209 ms 8280 KB Output is correct
2 Correct 234 ms 8288 KB Output is correct
3 Correct 224 ms 8284 KB Output is correct
4 Incorrect 272 ms 8528 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 242 ms 8284 KB Output is correct
2 Correct 292 ms 8284 KB Output is correct
3 Correct 215 ms 8284 KB Output is correct
4 Correct 283 ms 8284 KB Output is correct
5 Correct 263 ms 8284 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 255 ms 9836 KB Output is correct
2 Correct 273 ms 9820 KB Output is correct
3 Correct 287 ms 9844 KB Output is correct
4 Correct 330 ms 9816 KB Output is correct
5 Correct 317 ms 10064 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 294 ms 9820 KB Output is correct
2 Correct 339 ms 9836 KB Output is correct
3 Correct 260 ms 9832 KB Output is correct
4 Correct 334 ms 9840 KB Output is correct
5 Correct 323 ms 9840 KB Output is correct

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 284 ms 11404 KB Output is correct
2 Correct 315 ms 11400 KB Output is correct
3 Correct 336 ms 11404 KB Output is correct
4 Incorrect 412 ms 11404 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 328 ms 11608 KB Output is correct
2 Incorrect 398 ms 11356 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 346 ms 12972 KB Output is correct
2 Incorrect 362 ms 12892 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 380 ms 12888 KB Output is correct
2 Correct 451 ms 12972 KB Output is correct
3 Correct 345 ms 12972 KB Output is correct
4 Correct 440 ms 12976 KB Output is correct
5 Correct 436 ms 12972 KB Output is correct

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 403 ms 16104 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 470 ms 16104 KB Output is correct
2 Correct 553 ms 16108 KB Output is correct
3 Correct 444 ms 16212 KB Output is correct
4 Correct 546 ms 16100 KB Output is correct
5 Correct 516 ms 16100 KB Output is correct