import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; import java.io.OutputStream; import java.util.StringTokenizer; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.HashMap; import java.util.Map; /** * Built using CHelper plug-in * Actual solution is at the top */ public class Main { public static void main(String[] args) { InputStream inputStream = System.in; OutputStream outputStream = System.out; InputReader in = new InputReader(inputStream); PrintWriter out = new PrintWriter(outputStream); Task solver = new Task(); solver.solve(1, in, out); out.close(); } static class Task { public void solve(int testNumber, InputReader in, PrintWriter out) { int N = in.nextInt(); int[] b = new int[N+1]; int sum = 0; for(int i=1; i<=N; i++){ b[i] = in.nextInt(); sum += b[i]; } int res=0; int min=1000000; for(int i=1; i<=10000; i++){ if(i%2==0) continue; int p = ((i+1)/2)*((i+1)/2); if(sum