#-------------------------------------------------------------
#
# Licensed to the Apache Software Foundation (ASF) under one
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# 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
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# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
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args <- commandArgs(TRUE)
options(digits=22)

library("Matrix")

A = as.matrix(readMM(paste(args[1], "A.mtx", sep="")))
B = as.matrix(readMM(paste(args[1], "B.mtx", sep="")))
C = as.matrix(readMM(paste(args[1], "C.mtx", sep="")))
m = max(max(nrow(A), nrow(B)), nrow(C))
n = max(max(ncol(A), ncol(B)), ncol(C))

if( nrow(A)==1 ) {
  A = matrix(A, m, n);
}
if( nrow(B)==1 ) {
  B = matrix(B, m, n);
}
if( nrow(C)==1 ) {
  C = matrix(C, m, n);
}  

R = matrix(ifelse(as.vector(A), as.vector(B), as.vector(C)), m, n);

writeMM(as(R, "CsparseMatrix"), paste(args[2], "R", sep=""));