#include <bits/stdc++.h> using namespace std; #define int long long #define double long double #define f first #define s second #define pb push_back #define yes cout << "yes" << endl; #define YES cout << "YES" << endl; #define no cout << "no" << endl; #define NO cout << "NO" << endl; void never_give_up() { int n; cin >> n; //double d = sqrt(n); //cout << fixed << setprecision(20) << d / 2 << endl; vector<pair<int, int>>vt(n + 1); for(int i = 1;i <= n; i++){ int a, b; cin >> a >> b; vt[i] = {a, b}; } if(n == 1){ cout << 0 << endl; return; } cout << endl; int ans = 0; for(int i = 1;i <= n; i++){ int cvb = LLONG_MAX; for(int j = 1;j <= n; j++){ if(j != i){ int a = abs(vt[i].f - vt[j].f); int b = abs(vt[i].s - vt[j].s); a *= a; b *= b; //cout << i << " " << j << " : " << a << " " << b << endl; cvb = min(cvb, a + b); //cout << cvb << endl; } } //cout << i << " " << cvb << endl; ans = max(ans, cvb); /*for(int j = 1;j <= n; j++){ if(j != i){ int a = abs(vt[i].f - vt[j].f); int b = abs(vt[i].s - vt[j].s); a *= a; b *= b; //cout << i << " " << j << " : " << a << " " << b << endl; if(a + b == cvb){ } } }*/ } //cout << ans << endl; double d = sqrt(ans); cout << fixed << setprecision(20) << d / 2 << endl; } void You_can_do_it() { } signed main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); int THE_wasd = 1; //cin >> THE_wasd; while(THE_wasd--){ never_give_up(); //You_can_do_it(); } }