Enc$1($k$,$ m$)$ is defined as follows: It's IND$-$CPA. It runs Enc$($k$,$ m$)$ and obtains c$0$; the output ciphertext c :$=$ c$0||0,$i$.$e$.,$ with an extra padding of $0$ at the end all the time. Is c still IND$-$CPA?