Given an integer mxn matrix A satisfying certain regularity assumptions, a
well-known integer programming problem asks to find an integer point in the
associated knapsack polytope P(A, b)={x: A x= b, x>=0} or determine that no
such point exists. We obtain a LLL-based polynomial time algorithm that solves
the problem subject to a constraint on the location of the vector b.Comment: improved versio
