/in/foo.cc:6:13: error: expected unqualified-id before ',' token
 int L,m,b=0;,a[10000+10];
             ^
/in/foo.cc:6:25: error: expected constructor, destructor, or type conversion before ';' token
 int L,m,b=0;,a[10000+10];
                         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:12: error: 'a' was not declared in this scope
     memset(a,0,sizeof(a));
            ^
/in/foo.cc:10:10: error: 'l' was not declared in this scope
     cin>>l>>m;
          ^