Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:30:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[k].size(); ++i) { ^ user.cpp: In function ‘void DFSt(int)’: user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<vt[k].size(); ++i) ^ user.cpp: In function ‘void DF(int)’: user.cpp:43:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<tare[k].size(); ++i) { ^ user.cpp: In function ‘void sortaret()’: user.cpp:68:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<tare[nod].size(); ++i) { ^ user.cpp:50:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,nod, VV=0; ^ user.cpp: In function ‘int main()’: user.cpp:103:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<comp[i].size(); ++j) { ^ user.cpp:106:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (o=0; o<v[nod].size(); ++o) { //verific vecinii ^ user.cpp:127:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<comp[i].size(); ++j) ^ user.cpp:81:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("drumuri5.in", "r", stdin); ^ user.cpp:82:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("drumuri5.out", "w", stdout); ^ user.cpp:84:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &n, &m); ^ user.cpp:86:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &x, &y); ^