import std.stdio, std.string, std.conv, std.algorithm; import std.range, std.array, std.math, std.typecons; int n; int[] a; void main() { scan(n); a = readln.split.to!(int[]); a.sort(); if (n & 1) { writeln(a[n/2]); } else { double ans = (a[n/2] + a[n/2 - 1]) / 2.0; writefln("%.1f", ans); } } void scan(T...)(ref T args) { auto line = readln.split; foreach (ref arg ; args) { arg = line.front.to!(typeof(arg)); line.popFront(); } assert(line.empty); }