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args <- commandArgs(TRUE)
options(digits=22)

library("Matrix")

W = as.matrix(readMM(paste(args[1], "W.mtx", sep="")))
U = as.matrix(readMM(paste(args[1], "U.mtx", sep="")))
V = as.matrix(readMM(paste(args[1], "V.mtx", sep="")))

R = W*(2*(U%*%t(V)));

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