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Submission #948283

# Submission time Handle Problem Language Result Execution time Memory
948283 2024-03-18T03:21:36 Z Amaarsaa Mobile (BOI12_mobile) C++14
0 / 100
 411 ms 32624 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long ;

ll n, l;
ll x[1000005], y[1000005];
bool Can(double R) {
	double D, x1, x2, mx = 0.0;
	for (int j = 1; j <= n; j ++) {
		D = (R - y[j]) * (R + y[j]);
		D = sqrt(D);
		x1 = x[j] - D;
		x2 = x[j] + D;
		if ( x1 > mx) return false;
		mx = max(mx,x2);
	}
	if ( mx < l) return false;
	return true;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	ll i;
	double lo , hi, mid;
	cin >> n >> l;
	
	for (i = 1; i <= n; i ++) {
		cin >> x[i] >> y[i];
	}
	lo = 0;
	hi = 2e9;
	
	for (i= 1; i <= 100;i ++) {
		mid = (lo + hi)/2;
		if (!Can(mid)) lo = mid;
		else hi = mid;
	}	
	cout << lo << endl;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Incorrect 1 ms 2396 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Incorrect 1 ms 2396 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2552 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2396 KB Output is correct
2 Incorrect 2 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 58 ms 7512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 32 ms 7312 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 7260 KB Output is correct
2 Incorrect 19 ms 7964 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #10
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 8284 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 41 ms 8300 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #12
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 203 ms 14980 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #13
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 162 ms 19284 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #14
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 240 ms 19976 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #15
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 115 ms 24828 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #16
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 286 ms 21160 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #17
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 141 ms 26364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #18
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 322 ms 21924 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #19
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 262 ms 28104 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #20
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 411 ms 24796 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #21
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 319 ms 32624 KB Output isn't correct
2 Halted 0 ms 0 KB -