COLUMBIA, S.C. (AP) — Dru Smith scored 17 and Mark Smith 13 as No. 20 Missouri snapped a three-game losing streak with a 93-78 victory over struggling South Carolina on Saturday.The Tigers (14-6, 7-6 Southeastern Conference) opened up a 19-point lead in the first half and stayed comfortably in front the rest of the way to sweep the Gamecocks (5-11, 3-9), who lost their fifth