codechef OJUMPS : http://www.codechef.com/problems/OJUMPS

gistfile1.txt

TLE:http://www.codechef.com/problems/OJUMPS
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;
import java.util.*;
import java.util.Collections;
import java.io.*;
import java.math.BigInteger;
public class Main{
        public static void main(String[] args) throws IOException
        {
                BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                long n = Long.parseLong(br.readLine());
                int[] jump = {1,2,3};
                int cnt = 0;
                int i=0;
                for(; i <= n;) {
                        if( i == n) {
                                System.out.println("yes");
                                break;
                        }
                        cnt = cnt%3;
                        i += jump[cnt];
                        cnt +=1;
                }
                if(i >n)
                        System.out.println("no");

        }
}