foo.cc: In function 'int fmp(int*, int)':
foo.cc:13:16: warning: 'wz' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |         return wz;
      |                ^~
foo.cc: In function 'int main()':
foo.cc:22:39: warning: 'wz' may be used uninitialized in this function [-Wmaybe-uninitialized]
   22 |         cout<<fmp(a,n1)<<" "<<fmp(b,n2)<<endl;
      |                                       ^
foo.cc:22:26: warning: 'wz' may be used uninitialized in this function [-Wmaybe-uninitialized]
   22 |         cout<<fmp(a,n1)<<" "<<fmp(b,n2)<<endl;
      |                          ^~~

[Hydro](https://hydro.ac)提供评测服务