foo.cc: In function 'int main()':
foo.cc:10:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if(x1%i==0)
   ^~
foo.cc:12:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
      cout<<"No";
      ^~~~
foo.cc:5:8: warning: 'x' is used uninitialized in this function [-Wuninitialized]
  int x,x1=x;
        ^~

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