foo.cc: In function 'int SetInter(int*, int, int*, int, int*, int)':
foo.cc:32:9: warning: value computed is not used [-Wunused-value]
  c[10000],n3=0;
  ~~~~~~~^
foo.cc:32:9: warning: left operand of comma operator has no effect [-Wunused-value]
foo.cc: In function 'int main()':
foo.cc:20:41: warning: 'n4' is used uninitialized in this function [-Wuninitialized]
  int d[10000],n4=SetInter(a,n1,b,n2,d,n4);
                                         ^
foo.cc:21:41: warning: 'n5' is used uninitialized in this function [-Wuninitialized]
  int e[10000],n5=SetInter(a,n1,c,n3,e,n5);
                                         ^

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。