import sys
import java.lang as lang
import java.io as io
import com.lowagie.text as itext
import com.lowagie.text.pdf as pdf


false=0
true=1

# nombre font size
FONT_SIZE=20
FONT=pdf.BaseFont.createFont("Times-Roman", "Cp1252", false)

# nombre stamp location(x,y)
DIFF_X=50
DIFF_Y=50

# 
START_PAGE_NUMBER=1


infile=sys.argv[1]
outfile=sys.argv[2]

def doStamp(pagenumber,infile,outfile):

	fin=io.FileInputStream(infile)
	fout=io.FileOutputStream(outfile)

	r=pdf.PdfReader(fin)

	stamper=pdf.PdfStamper(r,fout)

	n=r.getNumberOfPages()

	cnt=0
	while( cnt< n ):
		cnt=cnt+1

		over=stamper.getOverContent(cnt)
		over.beginText()
		over.setFontAndSize(FONT,FONT_SIZE)
		over.setTextMatrix(DIFF_X,DIFF_Y)
		over.showText(lang.String.valueOf(cnt+pagenumber-1))
		over.endText()

	stamper.close()
	r.close()
	fin.close()
	fout.close()



doStamp(START_PAGE_NUMBER,infile,outfile)