PROGRAM LAB
      IMPLICIT NONE
      COMMON/size/x,n,m
      INTEGER x,n,m
      REAL array(100000)
      CALL GetSize()
      CALL ReadMatrix(array(1))
      CALL ReadVector(array(n*2+m+1))
      CALL Mult(array(1),array(n+1),array(n*2+1),
     *array(n*2+m+1),array(n*2+m+x+1))
      CALL OutMatrix(array(1),array(n+1),array(n*2+1))
      CALL Output(array(n*2+m+x+1))
      PAUSE
      STOP
      END



      SUBROUTINE GetSize()
      IMPLICIT NONE
      COMMON/size/x,n,m
      INTEGER n,m,r,x
      OPEN(1,FILE='size.txt',ERR=1)
      READ(1, *) x,n,m
      CLOSE(1)
      GOTO 2
   1  PAUSE 'Error reading file.'
      STOP
   2  CONTINUE
      END



      SUBROUTINE ReadMatrix(Xi)
      IMPLICIT NONE
      REAL Xi(*)
      COMMON/size/x,n,m
      INTEGER n,m,i,x

      OPEN(2,FILE='an.txt',err=1)
      DO i=1,n,1
      READ(2, *) Xi(i)
      END DO
      CLOSE(3)

      OPEN(3,FILE='ja.txt',err=1)
      DO i=1,n,1
      READ(3, *) Xi(n+i)
      END DO
      CLOSE(4)

      OPEN(4,FILE='ia.txt',err=1)
      DO i=1,m,1
      READ(4, *) Xi(n*2+i)
      END DO
      CLOSE(4)

      GOTO 2
   1  PAUSE 'Error reading file.'
      STOP
   2  CONTINUE
      END



      SUBROUTINE ReadVector(Xi)
      IMPLICIT NONE
      COMMON/size/x,n,m
      INTEGER n,m,i,x
      REAL Xi(*)

      OPEN(5,FILE='vector.txt',err=1)
      DO i=1,x,1
      READ(5, *) Xi(i)
      END DO
      CLOSE(6)

      GOTO 2
   1  PAUSE 'Error reading file.'
      STOP
   2  CONTINUE
      END



      SUBROUTINE Mult(an, ja, ia, v, result)
      IMPLICIT NONE
      COMMON/size/x,n,m
      INTEGER n,m,lim1,lim2,prom,i,j,x
      REAL an(n), ja(n), ia(m), v(x), result(x),k

      DO i=1,n,1
      PRINT *,an(i)
      END DO

      DO i=1,m,1
      lim1 = ia(i)
      lim2 = ia(i+1) - 1
      DO j=lim1,lim2,1
      prom=ja(j)
      result(i)=result(i)+v(prom)*an(j)
      k = result(i)
      END DO
      END DO

      RETURN
      END



      SUBROUTINE OutMatrix(an, ja, ia)
      IMPLICIT NONE
      COMMON/size/x,n,m
      INTEGER n,m,i,j,x,q,c,w
      REAL an(n), ja(n), ia(m)
      OPEN (7,FILE='outMatrix.txt')

      q = 1
      DO j=1,x,1
      IF(ia(j) .LT. ia(j+1)) THEN
      c = 1
      ELSE
      c = 0
      ENDIF
      w = ia(j+1) - ia(j)

      DO i=1,x,1
      IF(ja(q).EQ.i.AND.c.EQ.1.AND.w.GT.0) THEN
      WRITE (7,30) an(q)
      q = q + 1
      w = w - 1
      ELSE
      WRITE (7,30) 0.0
      ENDIF

      ENDDO
      WRITE (7,20)

      ENDDO

      CLOSE(7)

   20 FORMAT (A1, ' ')
   30 FORMAT (E10.4, ' ' \)
      END



      SUBROUTINE Output(Xi)
      IMPLICIT NONE
      COMMON/size/x,n,m
      REAL Xi(*)
      INTEGER n,m,i,x
      OPEN (6,FILE='output.txt')
      DO i=1,x,1
      WRITE (6,20) Xi(i)
      END DO
      CLOSE(6)

   20 FORMAT (E10.4)
      END