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Submission #906182

# Submission time Handle Problem Language Result Execution time Memory
906182 2024-01-13T15:13:30 Z Nonoze Mobile (BOI12_mobile) C++17
52 / 100
 294 ms 18640 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>=0.001) {
		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(pow(mid, 2)-pow(y, 2));
			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 500 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 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 600 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 344 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 1 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 2 ms 344 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

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 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 600 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 1 ms 348 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 2520 KB Output is correct
2 Correct 17 ms 1500 KB Output is correct
3 Correct 12 ms 1480 KB Output is correct
4 Correct 17 ms 2516 KB Output is correct
5 Correct 5 ms 344 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 22 ms 2520 KB Output is correct
2 Correct 18 ms 1500 KB Output is correct
3 Correct 19 ms 2520 KB Output is correct
4 Correct 23 ms 2452 KB Output is correct
5 Correct 13 ms 988 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 18 ms 1500 KB Output is correct
3 Incorrect 14 ms 760 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 8652 KB Output is correct
2 Correct 69 ms 772 KB Output is correct
3 Correct 64 ms 824 KB Output is correct
4 Incorrect 108 ms 9156 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 69 ms 680 KB Output is correct
2 Correct 168 ms 10692 KB Output is correct
3 Correct 74 ms 2636 KB Output is correct
4 Correct 109 ms 10192 KB Output is correct
5 Correct 103 ms 9924 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 142 ms 17588 KB Output is correct
2 Correct 77 ms 636 KB Output is correct
3 Correct 76 ms 548 KB Output is correct
4 Correct 146 ms 17872 KB Output is correct
5 Correct 115 ms 9028 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 656 KB Output is correct
2 Correct 187 ms 17588 KB Output is correct
3 Correct 75 ms 2512 KB Output is correct
4 Correct 137 ms 18420 KB Output is correct
5 Correct 138 ms 18612 KB Output is correct

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 167 ms 17848 KB Output is correct
2 Correct 92 ms 748 KB Output is correct
3 Correct 92 ms 460 KB Output is correct
4 Incorrect 167 ms 17076 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 93 ms 596 KB Output is correct
2 Incorrect 212 ms 18100 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 193 ms 18640 KB Output is correct
2 Incorrect 106 ms 632 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 108 ms 900 KB Output is correct
2 Correct 235 ms 17452 KB Output is correct
3 Correct 105 ms 2500 KB Output is correct
4 Correct 200 ms 17336 KB Output is correct
5 Correct 160 ms 17500 KB Output is correct

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 232 ms 17076 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 131 ms 592 KB Output is correct
2 Correct 294 ms 17592 KB Output is correct
3 Correct 132 ms 4716 KB Output is correct
4 Correct 227 ms 18408 KB Output is correct
5 Correct 241 ms 17492 KB Output is correct