#-------------------------------------------------------------
#
# 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.
#
#-------------------------------------------------------------

X = rbind(read($X1), read($X2))
Y = rbind(read($Y1), read($Y2))
W = rand(rows=nrow(X), cols=ncol(X), min=0, max=1, pdf='uniform', seed=5)
step_sz = 4
s = t(X) %*% Y
Xd = X %*% s
Z0 = W + step_sz * X
Z1 = 1 - Y * Z0
Z2 = (Z1 > 0)
Z3 = Z1 * Z2
Z = sum(Z3 * Y * Xd)
write(Z, $Z)
