Eroare de compilare: user.cpp:17:11: error: ‘int index’ redeclared as different kind of symbol int n, m, index = 0; ^ In file included from /usr/include/c++/5/cstring:42:0, from user.cpp:2: /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 r_dfs(int)’: user.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < rv[nod].size(); i ++){ ^ user.cpp: In function ‘void dfs(int)’: user.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); i ++){ ^ user.cpp:44:19: error: no pre-increment operator for type idx[nod] = ++ index; ^ user.cpp: In function ‘int main()’: user.cpp:83:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i ++){ ^ user.cpp:84:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < sol[i].size(); j ++){ ^