X$X$ is an n$n$-dim positively curved manifold and Y$Y$ is a totally geodesic submanifold of codimension 1.Then Then cutting along Y$Y$ we get n$n$-dim positively curved manifolds without boundary,by by soul theorem these manifolds should be homeomorphic to R^n$\Bbb R^n$.Am Am I right?If not,please give counterexamples.