End condition of an IF loop that depends on a 3D array

I'm writing a program which will move a particle about a cube, either left,right,up,down, back or forward depending on the value randomly generator by the program. The particle is able to move with cube of dimensions LxLxL. I wish the program to stop when the particle has been to all possible sites and the number of jumps taken output.

Currently I am doing this using an array[i][j][k] and when the particle has been to a position, changing the value of the array at that corresponding point to 0. However, in my IF loop I have to type out every possible combination of i,j and k in order to say if they are all equal to 0 the program should end. Would there be a better way to do this?

Thanks, Beth

#include<stdio.h>
#include<math.h>

int randomint(int max);

main()
{
    int i, lmax, lmin, start, max, seed, x, n, y, finish, row, z, N, newrow,
    square, row, column, page, j, k;

start=1;
max=6;
lmin=1;
finish=0;
lmax=4;
square=pow(lmax,2);
N=pow(lmax,3);
//printf("Enter number of sites:");
//scanf("%d", &lmax);
printf("Enter random seed:");
scanf("%d", &seed);


srandom(seed);

for(i=1; i<21; i++)
{
    n=randomint(max);
    printf("random- %d\n", n);

    if(n==0)
    {

        z=start%lmax;               
        row=(start-z);          
        row=row/lmax;

        if(z==0)
        {
            row=row-1;
        }

        start=start-1;
        z=start%lmax;
        newrow=(start-z);
        newrow=newrow/lmax;

        if(z==0)
        {
            row=row-1;
        }

        if(start<=0)
        {
            newrow=-1;
        }

        if(newrow!=row)
        {
            start=start+lmax;
        }
    }

    if(n==1)
    {
        z=start%square; 
        row=(start-z);          
        row=row/square;

        start=start+lmax;
        z=start%square;
        newrow=(start-z);
        newrow=newrow/square;

        if(z==0)
        {
            newrow=newrow-1;
        }



        if(row!=newrow)
        {
            start=start-square;
        }

    }
    if(n==2)
    {
        z=start%N;  
        row=(start-z);          
        row=row/N;
        row=row+1;

        start=start+square;
        z=start%N;
        newrow=(start-z);
        newrow=newrow/N;
        newrow=newrow+1;

        if(newrow!=row)
        {
            start=start-N;
        }
    }

    if(n==3)
    {           

        z=start%lmax;               
        row=(start-z);          
        row=row/lmax;

        if(z==0)
        {
            row=row-1;
        }


        start=start+1;
        z=start%lmax;
        newrow=(start-z);
        newrow=newrow/lmax;

        if(z==0)
        {
            newrow=newrow-1;
        }




        if(newrow!=row)
        {
            start=start-lmax;
        }

    }           

    if(n==4)
    {
        z=start%square;                 
        row=(start-z);          
        row=row/square;

        if(z==0)
        {
            row=row-1;
        }


        start=start-lmax;
        z=start%square;
        newrow=(start-z);
        newrow=newrow/square;

        if(z==0)
        {
            row=row-1;
        }

        if(start<=0)
        {
            newrow=-1;
        }

        if(row!=newrow)
        {
            start=start+square;
        }

    }

    if(n==5)
    {   
        z=start%N;  
        row=(start-z);          
        row=row/N;
        row=row+1;


        start=start-square;
        z=start%N;
        newrow=(start-z);
        newrow=newrow/N;
        newrow=newrow+1;
        if(start<0)
        {
            newrow=-1;
        }

        if(newrow!=row)
        {
            start=start+N;
        }

    }

    printf("postition: %d\n", start);
    column=start%lmax;

    row=(start-column);         
    row=row/lmax;

    if(column==0)
    {
        row=row-1;
    }

    z=start%square;
    page=(start-z);
    page=page/lmax;

    if(z==0)
    {
        page=page-1;
    }

    i=page;
    j=column;
    k=row;

    list[i][j][k]=0;
    counter=counter+1;

    for(i = 0; i < 15; i++) 

    {
        for(j= 0; j < 15; j++) 

        {
                for(k = 0; k < 15; k++) 

            {
                    printf("%d ", list[i][j][k]);
                }
            }
        }

    **if((list[0][0][0]=0)&&(list[1][0][0]==0)&&(list[0][0][1]=0)&&(list[0]
  [1]
  [0]==0)&&(list[1][1][0]==0)&&(list[1][0][1]==0)&&(list[0][1][1]==0)&&
  (list[1][1][1]==0)&&(list[2][0][0]==0)&&(list[2][0][1]==0)&&(list[2][1]
  [0]==0)&&(list[2][1][1]==0)&&(list[2][2][0]==0)&&(list[2][2][1]==0)&&
  (list[2][1][2]==0)&&(list[2][2][2]=0)&&(list[0][2][0]==0)&&(list[0][2]
  [1]==0)&&(list[1][2][0]==0)&&(list[1][2][1]==0)&&(list[0][2][2]==0)&&
  (list[2][2][2]==0)&&(list[0][0][2]==0)&&(list[2][1][1]==0))**
        {
            finish=1;
        }





}

}
    int randomint( int max)
    {
        return (random() % max);
    }