/in/foo.cc: In function 'int main()':
/in/foo.cc:12:9: warning: 'x' may be used uninitialized [-Wmaybe-uninitialized]
   12 |         if(x==n)
      |         ^~
/in/foo.cc:5:15: note: 'x' was declared here
    5 |         int n,x,y=0;
      |               ^