public void solve(int row,int column){
        if(row==rows && column==0){
            //print();
            //System.out.println("end");
            return;
        }
        //System.out.println("R:"+row+" C:"+column);
        for(Integer color:colors){
            board[row][column]=color;
            if(satisfiesConstraints(row, column)){
                //System.out.println("----------------------------------");
                //dodělat shift na konci řádku
                if(column+1<columns){
                    solve(row,column+1);
                } else {
                    solve(row + 1, 0);
                }
            }
        }
        board[row][column]=-1;
    }