/in/foo.cc: In function 'void dfs(int, ll, ll)':
/in/foo.cc:32:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if(~ans[d])
     ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:60:24: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
     printf("%d ",ans[i]);
                        ^