/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// Deveria retornar false mas retorna true
        System.out.println(contem1a9(new int[]{1,2}));

        // deveria retornar true? Bem, retorna false
System.out.println(contem1a9(new int[]{9,8,7,6,5,4,3,2,1}));

	}

public static boolean contem1a9(int[] v)  {
	for(int i = 0; i < v.length; i++) {
		if(v[i] != (i+1)) {
             return false;
		}
	}

	return true;
}

}