int countZero =0;
for(int i=0; i<n;i++){
if(a[i]==0)
countZero++;
}
for(int i=n-1;i>n-1-countZero;i--){
int x = 0, temp, j;
for(j=i;j>=0;j--) {
temp = a[j];
if(x!=0||j==i)
a[j]=x;
x = temp;
}
}
for(int i=0;i<n;i++){
System.out.print(a[i]+" ");
}