Compilare: user.cpp: In function ‘void afis(int)’: user.cpp:21:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[i].size();j++) ^ user.cpp: In function ‘int From(int)’: user.cpp:28:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size();i++){ ^ user.cpp: In function ‘void Solve(int, int)’: user.cpp:40:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i++){ ^ user.cpp:44:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(V[G[nod][i]] == G[G[nod][i]].size() - 1 ){ ^ user.cpp: In function ‘int main()’: user.cpp:55:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cezar.in" , "r", stdin); ^ user.cpp:56:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cezar.out" , "w", stdout); ^