/in/foo.cc: In function 'void dfs(long long int, long long int)':
/in/foo.cc:43:8: warning: unused variable 'i' [-Wunused-variable]
     ll i,j=0,k,sum=0,times=1;
        ^
/in/foo.cc:43:10: warning: variable 'j' set but not used [-Wunused-but-set-variable]
     ll i,j=0,k,sum=0,times=1;
          ^