#-------------------------------------------------------------
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#
#-------------------------------------------------------------

# A = matrix(2, rows=2,cols=2)
# B = matrix(3, rows=3,cols=3)
# C = matrix(4, rows=4,cols=4)
A = read($1)
B = read($2)
C = read($3)
# A = matrix("1 1 1 1", rows=2, cols=2)
# B = matrix("3 2 1 1 2 3 3 1 2", rows=3, cols=3)
# C = matrix("1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4", rows=4, cols=4)
ans = raJoin(A, 1, raJoin(B, 2, C, 3, "nested-loop"), 3, "nested-loop")
# ans = raJoin(raJoin(A,1,B,3, "nested-loop"),4,C,3, "nested-loop")
write(ans, $4)