oj.uz

답안 #494152

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
494152 2021-12-14T12:55:54 Z PikaQ Mobile (BOI12_mobile) C++17
100 / 100
 898 ms 46328 KB 
#include<bits/stdc++.h>
#define int ll
#define forn(i,n) for(int i=0;i<(n);i++)
#define Forn(i,n) for(int i=1;i<=(n);i++)
#define ll long long
#define pb push_back
#define F first
#define S second
#define lb lower_bound
#define ub upper_bound
#define vi vector<int>
#define vl vector<long long>
#define vpi vector<pair<int,int> >
#define pii pair<int,int>
#define pll pair<long long,long long>
#define mp make_pair
#define rz resize
#define all(p) p.begin(),p.end()
#define alr(p,q) p+1,p+q+1
#define ull unsigned long long
#define st0(p) memset((p),0,sizeof(p))
#define T(x) ((x)%2 ? s[(x)/2] : '.')
#define lowb(x) x&-x
#define ls(x) (x)*2
#define rs(x) (x)*2+1
using namespace std;
 
inline void USACO(string filename){
	freopen((filename+".in").c_str(),"r",stdin);
	freopen((filename+".out").c_str(),"w",stdout);
}
 
void debug() {cout << endl;}
template <class T, class ...U> void debug(T a, U ... b) { cout << a << " "; debug(b...);}
// template <class T> int max(T a, T ... b) { cout << a << " "; debug(b...);}
const int INF = 1e9+7;
const double eps = 1e-7;
const int N = 8e2+9;
int n;
 
#define double long double
#define pdd pair<double,double> 
int L;
vector<pdd> p;
 
 
bool check(double R){
	vector<pdd> vs;
	double cur = 0;
	for(auto &i : p){
		double dy = abs(i.S);
		if(dy - R > eps) continue;
		double d = sqrt(R*R - dy*dy);
		double l = i.F -d,r = i.F +d;
		if(l <= cur) cur = max(cur,(double)r);
	}
	
	return cur >= L;
}
 
void solve(){
	cin >> n >> L;
	p.rz(n);
	forn(i,n) cin >> p[i].F >> p[i].S;
	sort(all(p));
	double lo = 0,hi = 1e9;
	while(hi - lo > 1e-3){
		double mid = (lo+hi)/2;
		if(check(mid)) hi = mid;
		else lo = mid;
	}
	// debug(check((double)10));
	cout << hi << '\n';
}		 	
 
 
 
signed main(){
	// USACO("angry");
	cin.tie(0);
	cout.tie(0);
	ios_base::sync_with_stdio(0);
 
		cout << fixed << setprecision(4);
	// int t;
	// cin >> t;
	// while(t--)
	solve();
	return 0;
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 316 KB Output is correct

Subtask #3
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 3 ms 332 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 460 KB Output is correct
2 Correct 5 ms 460 KB Output is correct
3 Correct 4 ms 460 KB Output is correct
4 Correct 5 ms 460 KB Output is correct

Subtask #5
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 460 KB Output is correct
2 Correct 6 ms 460 KB Output is correct
3 Correct 4 ms 460 KB Output is correct
4 Correct 5 ms 460 KB Output is correct

Subtask #6
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 452 KB Output is correct
2 Correct 5 ms 460 KB Output is correct
3 Correct 4 ms 460 KB Output is correct
4 Correct 5 ms 460 KB Output is correct
5 Correct 4 ms 460 KB Output is correct

Subtask #7
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 80 ms 3132 KB Output is correct
2 Correct 87 ms 3376 KB Output is correct
3 Correct 41 ms 2276 KB Output is correct
4 Correct 58 ms 3344 KB Output is correct
5 Correct 36 ms 2264 KB Output is correct

Subtask #8
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 3140 KB Output is correct
2 Correct 60 ms 2944 KB Output is correct
3 Correct 64 ms 3524 KB Output is correct
4 Correct 57 ms 3552 KB Output is correct
5 Correct 65 ms 3776 KB Output is correct

Subtask #9
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 63 ms 3404 KB Output is correct
2 Correct 70 ms 3552 KB Output is correct
3 Correct 66 ms 3604 KB Output is correct
4 Correct 95 ms 4180 KB Output is correct
5 Correct 68 ms 3688 KB Output is correct

Subtask #10
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 4108 KB Output is correct
2 Correct 91 ms 3864 KB Output is correct
3 Correct 98 ms 3756 KB Output is correct
4 Correct 85 ms 3836 KB Output is correct
5 Correct 72 ms 3912 KB Output is correct

Subtask #11
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 92 ms 4140 KB Output is correct
2 Correct 88 ms 4140 KB Output is correct
3 Correct 103 ms 4160 KB Output is correct
4 Correct 86 ms 4104 KB Output is correct
5 Correct 72 ms 4164 KB Output is correct

Subtask #12
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 389 ms 16940 KB Output is correct
2 Correct 478 ms 16764 KB Output is correct
3 Correct 452 ms 16856 KB Output is correct
4 Correct 400 ms 16836 KB Output is correct
5 Correct 393 ms 16836 KB Output is correct

Subtask #13
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 457 ms 16992 KB Output is correct
2 Correct 427 ms 16736 KB Output is correct
3 Correct 397 ms 16820 KB Output is correct
4 Correct 397 ms 16848 KB Output is correct
5 Correct 372 ms 16736 KB Output is correct

Subtask #14
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 481 ms 20024 KB Output is correct
2 Correct 567 ms 19904 KB Output is correct
3 Correct 585 ms 20112 KB Output is correct
4 Correct 470 ms 19872 KB Output is correct
5 Correct 447 ms 19884 KB Output is correct

Subtask #15
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 524 ms 20212 KB Output is correct
2 Correct 515 ms 20060 KB Output is correct
3 Correct 447 ms 19880 KB Output is correct
4 Correct 471 ms 19876 KB Output is correct
5 Correct 438 ms 20036 KB Output is correct

Subtask #16
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 546 ms 23248 KB Output is correct
2 Correct 635 ms 23004 KB Output is correct
3 Correct 603 ms 23068 KB Output is correct
4 Correct 555 ms 23184 KB Output is correct
5 Correct 520 ms 23108 KB Output is correct

Subtask #17
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 663 ms 23248 KB Output is correct
2 Correct 608 ms 23068 KB Output is correct
3 Correct 530 ms 23196 KB Output is correct
4 Correct 567 ms 23108 KB Output is correct
5 Correct 519 ms 23236 KB Output is correct

Subtask #18
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 632 ms 26360 KB Output is correct
2 Correct 704 ms 26272 KB Output is correct
3 Correct 691 ms 26340 KB Output is correct
4 Correct 620 ms 26300 KB Output is correct
5 Correct 595 ms 26304 KB Output is correct

Subtask #19
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 705 ms 26376 KB Output is correct
2 Correct 672 ms 26144 KB Output is correct
3 Correct 595 ms 26180 KB Output is correct
4 Correct 628 ms 26132 KB Output is correct
5 Correct 592 ms 26216 KB Output is correct

Subtask #20
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 784 ms 32624 KB Output is correct
2 Correct 898 ms 32128 KB Output is correct
3 Correct 867 ms 32068 KB Output is correct
4 Correct 782 ms 32108 KB Output is correct
5 Correct 733 ms 32056 KB Output is correct

Subtask #21
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 866 ms 32824 KB Output is correct
2 Correct 848 ms 33044 KB Output is correct
3 Correct 797 ms 43976 KB Output is correct
4 Correct 775 ms 33220 KB Output is correct
5 Correct 771 ms 46328 KB Output is correct