/in/foo.cc:128:1: error: 'cin' does not name a type
 cin>>X0>>m;
 ^~~
/in/foo.cc:129:1: error: expected unqualified-id before 'for'
 for(int i=1; i<=n; i++) {
 ^~~
/in/foo.cc:129:14: error: 'i' does not name a type
 for(int i=1; i<=n; i++) {
              ^
/in/foo.cc:129:20: error: 'i' does not name a type
 for(int i=1; i<=n; i++) {
                    ^
/in/foo.cc:136:1: error: 'cout' does not name a type
 cout<<ans<<endl;
 ^~~~
/in/foo.cc:137:1: error: expected unqualified-id before 'while'
 while(m--) {
 ^~~~~
/in/foo.cc:142:1: error: expected unqualified-id before 'return'
 return 0;
 ^~~~~~
/in/foo.cc:143:1: error: expected declaration before '}' token
 }
 ^