/in/foo.cc: In function 'int main()':
/in/foo.cc:10:3: error: expected primary-expression before '}' token
   }
   ^
/in/foo.cc:7:15: warning: unused variable 'a' [-Wunused-variable]
     long long a[bx+1][by+1],m[bx+1][by+1];
               ^
/in/foo.cc:7:29: warning: unused variable 'm' [-Wunused-variable]
     long long a[bx+1][by+1],m[bx+1][by+1];
                             ^