#include<bits/stdc++.h>
//#define int long long
#define ll long long
#define pb push_back
const int mod = 1e9+7;
using namespace std;
bool comp(string a,string b)
{
if(a.size()==b.size())
{
return a<b;
}
return a.size()<b.size();
}
int n;
vector<pair<long double,long double>>v;
long double dis(long double x1,long double y1,long double x2,long double y2)
{
return sqrt(abs(x1-x2)*abs(x1-x2)+abs(y1-y2)*abs(y1-y2));
}
bool valid(long double rad)
{
bool vis[n]={};
for(int i=0;i<n;i++)
{
for(int j=i+1;j<n;j++)
{
if(dis(v[i].first,v[i].second,v[j].first,v[j].second)<=rad)
{
vis[i]=1;
vis[j]=1;
}
}
}
bool val=1;
for(int i=0;i<n;i++)
{
val&=vis[i];
}
return val;
}
void solve(){
cin>>n;
for(int i=0;i<n;i++)
{
int x,y;
cin>>x>>y;
v.pb({x,y});
}
double x=2;
long double ans=1e9,s=0,e=1e9,m;
while((e-s)>=1e-10)
{
m=(s+e)/x;
// cout<<m<<" "<<valid(m)<<endl;
if(valid(m))
{
ans=m;
e=m-1e-10;
}
else
{
s=m+1e-10;
}
}
cout<<fixed<<setprecision(9)<<ans/x<<endl;
}
int32_t main(){
int t=1;
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
// cin>>t;
while(t--){solve();}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 3 |
Correct |
2 ms |
204 KB |
Output is correct |
| 4 |
Correct |
3 ms |
268 KB |
Output is correct |
| 5 |
Correct |
5 ms |
204 KB |
Output is correct |
| 6 |
Incorrect |
99 ms |
332 KB |
Output isn't correct |
| 7 |
Correct |
101 ms |
332 KB |
Output is correct |
| 8 |
Incorrect |
230 ms |
452 KB |
Output isn't correct |
| 9 |
Incorrect |
394 ms |
356 KB |
Output isn't correct |
| 10 |
Correct |
386 ms |
360 KB |
Output is correct |
