/in/foo.cc: In function 'int main()':
/in/foo.cc:103:17: warning: 'prod' may be used uninitialized in this function [-Wmaybe-uninitialized]
             prod*=Pow((N-1)/2);
             ~~~~^~~~~~~~~~~~~~
/in/foo.cc:41:15: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int u,v;
               ^
/in/foo.cc:41:13: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int u,v;
             ^