foo.cc: In function ‘int main()’:
foo.cc:9:21: warning: ‘n’ is used uninitialized [-Wuninitialized]
    9 |         for(LL i=1;i<=n;i++)
      |                    ~^~~
foo.cc:7:18: note: ‘n’ was declared here
    7 |         int d;LL n;
      |                  ^
foo.cc:14:34: warning: ‘d’ may be used uninitialized [-Wmaybe-uninitialized]
   14 |                         if(t%10==d) res++;
      |                                  ^
foo.cc:7:13: note: ‘d’ was declared here
    7 |         int d;LL n;
      |             ^