Charm production in deep inelastic e p scattering was measured with the ZEUS detector using an integrated luminosity of 354 pb(-1). Charm quarks were identified by reconstructing D-+/- mesons in the D-+/- -> K--/+pi(+/-)pi(+/-) decay channel. Lifetime information was used to reduce combinatorial background substantially. Differential cross sections were measured in the kinematic region 5 < Q(2) < 1000 GeV2, 0.02 < y < 0.7, 1.5 < p(T)(D-+/-) < 15 GeV and vertical bar eta(D-+/-)vertical bar < 1.6, where Q(2) is the photon virtuality, y is the inelasticity, and p(T)(D-+/-) and eta(D-+/-) are the transverse momentum and the pseudorapidity of the D-+/- meson, respectively. Next-to-leading-order QCD predictions are compared to the data. The charm contribution, F-2(c (c) over bar), to the proton structure-function F-2 was extracted.