Eroare de compilare: user.cpp: In function ‘void constrEuler(int, int)’: user.cpp:18:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[x].size(); i++) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:51:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[x].size(); i++) ^ user.cpp:55:6: error: reference to ‘hash’ is ambiguous if(hash[x]) ^ user.cpp:10:16: note: candidates are: bool hash [100005] bool viz[MAX], hash[MAX], elim[MAX]; ^ In file included from /usr/include/c++/4.8/bits/stl_bvector.h:1134:0, from /usr/include/c++/4.8/vector:65, from user.cpp:3: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:63:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[x].size(); i++) ^ user.cpp:69:13: error: reference to ‘hash’ is ambiguous if(!out && hash[x]){ ^ user.cpp:10:16: note: candidates are: bool hash [100005] bool viz[MAX], hash[MAX], elim[MAX]; ^ In file included from /usr/include/c++/4.8/bits/stl_bvector.h:1134:0, from /usr/include/c++/4.8/vector:65, from user.cpp:3: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp: In function ‘int main()’: user.cpp:97:4: error: reference to ‘hash’ is ambiguous hash[LCA(x, y)] = 1; ^ user.cpp:10:16: note: candidates are: bool hash [100005] bool viz[MAX], hash[MAX], elim[MAX]; ^ In file included from /usr/include/c++/4.8/bits/stl_bvector.h:1134:0, from /usr/include/c++/4.8/vector:65, from user.cpp:3: /usr/include/c++/4.8/bits/functional_hash.h:58:12: note: template<class _Tp> struct std::hash struct hash; ^ user.cpp:79:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ct.in", "r", stdin);