import java.util.*;
import java.io.*;
import java.math.BigInteger;
import static java.lang.Math.*;
 
/* spar5h */
 
public class Main implements Runnable {   
	
	public void run() {
		
		InputReader s = new InputReader(System.in);
		PrintWriter w = new PrintWriter(System.out);
		
		int n = s.nextInt();
		
		ArrayList<Integer>[] adj = new ArrayList[n];
		
		for(int i = 0; i < n; i++)
			adj[i] = new ArrayList<Integer>();
		
		for(int i = 0; i < n - 1; i++) {
			int u = s.nextInt() - 1, v = s.nextInt() - 1;
			adj[u].add(v); adj[v].add(u);
		}
		
		Queue<Integer> q = new LinkedList<Integer>();
		int[] d = new int[n];
		
		Arrays.fill(d, -1);
		
		for(int i = 0; i < n; i++) {
			if(adj[i].size() == 1) {
				q.add(i);
				d[i] = 0;
				break;
			}
		}	
		
		int leaf = -1;
		
		while(!q.isEmpty()) {
			
			int x = q.poll();
			leaf = x;
			
			for(int y : adj[x]) {
				
				if(d[y] == -1) {
					d[y] = d[x] + 1;
					q.add(y);
				}
			}
		}
		
		
		Arrays.fill(d, -1);
		
		if(leaf != -1) {
			d[leaf] = 0;
			q.add(leaf);
		}
		
		int diam = 1;
		
		while(!q.isEmpty()) {
			
			int x = q.poll();
			diam = d[x] + 1;
			
			for(int y : adj[x]) {
				
				if(d[y] == -1) {
					d[y] = d[x] + 1;
					q.add(y);
				}
			}
		}
		
		if(diam % 3 == 2)
			w.println("Second");
		else
			w.println("First");
		
 		w.close();
	}
	
	static class InputReader {
		
		private InputStream stream;
		private byte[] buf = new byte[1024];
		private int curChar;
		private int numChars;
		private SpaceCharFilter filter;
		
		public InputReader(InputStream stream) {
			this.stream = stream;
		}
		
		public int read() {
			
			if (numChars==-1) 
				throw new InputMismatchException();
			
			if (curChar >= numChars) {
				
				curChar = 0;
				
				try {
					numChars = stream.read(buf);
				}
				catch (IOException e) {
					throw new InputMismatchException();
				}
				
				if(numChars <= 0)				
					return -1;
			}
			
			return buf[curChar++];
		}
		 
		public String nextLine() {
			
			BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
			String str = "";
	        
			try {
	            str = br.readLine();
	        }
	        catch (IOException e) {
	            e.printStackTrace();
	        }
			
	        return str;
		}
		
		public int nextInt() {
		
			int c = read();
			
			while(isSpaceChar(c)) 
				c = read();
			
			int sgn = 1;
			
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			
			int res = 0;
			
			do {
				if(c<'0'||c>'9') 
					throw new InputMismatchException();
				
				res *= 10;
				res += c - '0';
				c = read();
			}
			while (!isSpaceChar(c)); 
			
			return res * sgn;
		}
		
		public long nextLong() {
			
			int c = read();
			
			while (isSpaceChar(c))
				c = read();
			
			int sgn = 1;
			
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			
			long res = 0;
			
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				
				res *= 10;
				res += c - '0';
				c = read();
			}
			
			while (!isSpaceChar(c));
				return res * sgn;
		}
		
		public double nextDouble() {
			
			int c = read();
			
			while (isSpaceChar(c))
				c = read();
			
			int sgn = 1;
			
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			
			double res = 0;
			
			while (!isSpaceChar(c) && c != '.') {
				
				if (c == 'e' || c == 'E')
					return res * Math.pow(10, nextInt());
				
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				
				res *= 10;
				res += c - '0';
				c = read();
			}
			
			if (c == '.') {
				
				c = read();
				double m = 1;
				while (!isSpaceChar(c)) 
				{
					if (c == 'e' || c == 'E')
						return res * Math.pow(10, nextInt());
					if (c < '0' || c > '9')
						throw new InputMismatchException();
					m /= 10;
					res += (c - '0') * m;
					c = read();
				}
			}
			
			return res * sgn;
		}
		
		public String readString() {
			
			int c = read();
			
			while (isSpaceChar(c))
				c = read();
			
			StringBuilder res = new StringBuilder();
			
			do {
				res.appendCodePoint(c);
				c = read();
			} 
			while (!isSpaceChar(c));
			
			return res.toString();
		}
	 
		public boolean isSpaceChar(int c) {
			
			if (filter != null)
				return filter.isSpaceChar(c);
			
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}
	 
		public String next() {
			return readString();
		}
		
		public interface SpaceCharFilter {
			public boolean isSpaceChar(int ch);
		}
	
	}
 
	public static void main(String args[]) throws Exception {
		new Thread(null, new Main(),"Main",1<<26).start();
	}
} 

Measured memory_bytes: 85112