Compilare: user.cpp: In function ‘int main()’: user.cpp:98:21: warning: unused variable ‘nod’ [-Wunused-variable] int nod = a; ^ user.cpp:117:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[a].size();i++) ^ user.cpp:124:21: warning: unused variable ‘nod’ [-Wunused-variable] int nod = a; ^ user.cpp:49:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch,x[100]; ^ user.cpp:51:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prietene.out","w",stdout); ^