Compilare: user.cpp: In function ‘void afis_componente_biconexe()’: user.cpp:70:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<componente.size(); i++, printf ("\n")) ^ user.cpp: In function ‘void Refresh_Components()’: user.cpp:83:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<componente.size(); i++) ^ user.cpp: In function ‘void Make_Codes_And_Tree()’: user.cpp:99:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<componente.size(); i++) ^ user.cpp: In function ‘void afis()’: user.cpp:130:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<answer.size(); i++) ^ user.cpp:137:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<answer.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:251:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<drum.size(); i++) ^ user.cpp:304:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<drum.size(); i++) ^ user.cpp:203:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("santa.in", "r", stdin); ^ user.cpp:204:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("santa.out", "w", stdout); ^ user.cpp:206:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &N, &M); ^ user.cpp:210:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &X, &Y); ^ user.cpp:214:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &S, &E, &Q); ^