Eroare de compilare: user.cpp:10:39: error: ‘std::vector<int> exit’ redeclared as different kind of symbol vector <int> nod[100001],nod2[100001],exit,ctc,comp[100001]; ^ In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/ext/string_conversions.h:41, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/stdlib.h:544:13: error: previous declaration of ‘void exit(int)’ extern void exit (int __status) __THROW __attribute__ ((__noreturn__)); ^ user.cpp: In function ‘int dfs(int)’: user.cpp:14:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[x].size();i++) ^ user.cpp:20:10: error: request for member ‘push_back’ in ‘exit’, which is of non-class type ‘void(int)throw ()’ exit.push_back(x); ^ user.cpp:21:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int dfs2(int, std::vector<int>&)’: user.cpp:24:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod2[x].size();i++) ^ user.cpp:31:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^