Eroare de compilare: user.cpp:14:24: error: ‘std::vector<std::pair<int, int> > index’ redeclared as different kind of symbol vector<pair<int,int> > index ; ^~~~~ In file included from /usr/include/c++/6/cstring:42:0, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/stdc++.h:48, from user.cpp:1: /usr/include/string.h:477:1: note: previous declaration ‘const char* index(const char*, int)’ index (const char *__s, int __c) __THROW ^~~~~ user.cpp: In function ‘void DFS(int)’: user.cpp:38:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < graf[nod].size() ; i++ ) ~~^~~~~~~~~~~~~~~~~~ user.cpp: In function ‘void DFS2(int, int)’: user.cpp:63:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0 ; i < graf[nod].size() ; i++ ) ~~^~~~~~~~~~~~~~~~~~ user.cpp:78:21: error: ‘index’ does not have class type index.push_back(make_pair(v.size(),nr)) ; ^~~~~ user.cpp: In function ‘int main()’: user.cpp:109:23: error: ‘index’ does not have class type for ( i = 0 ; i < index.size() ; i++ ) ^~~~~ user.cpp:111:26: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript for ( j = index[i].first-index[i].second ; j < index[i].first ; j++ ) ^ user.cpp:111:41: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript for ( j = index[i].first-index[i].second ; j < index[i].first ; j++ ) ^ user.cpp:111:63: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript for ( j = index[i].first-index[i].second ; j < index[i].first ; j++ ) ^ user.cpp:115:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < finall.size() ; i++ ) ~~^~~~~~~~~~~~~~~