foo.cc: In function ‘int main()’:
foo.cc:24:20: warning: ‘cnt’ may be used uninitialized [-Wmaybe-uninitialized]
   24 |                 cnt++;
      |                 ~~~^~
foo.cc:5:15: note: ‘cnt’ was declared here
    5 |         int n,cnt,day,x;
      |               ^~~
foo.cc:26:29: warning: ‘day’ may be used uninitialized [-Wmaybe-uninitialized]
   26 |         cout<<cnt<<' '<<day+1;
      |                             ^
foo.cc:5:19: note: ‘day’ was declared here
    5 |         int n,cnt,day,x;
      |                   ^~~