/in/foo.cc: In function 'void reda()':
/in/foo.cc:8:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:29:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (i=0;i<e[u].size();i++){
            ~^~~~~~~~~~~~
/in/foo.cc:34:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (i=1;i<=n;i++) printf("%d ",num[i]);printf("\n");
  ^~~
/in/foo.cc:34:42: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for (i=1;i<=n;i++) printf("%d ",num[i]);printf("\n");
                                          ^~~~~~
/in/foo.cc:19:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^