Compilare: user.cpp: In function ‘void Dfs(int)’: user.cpp:36:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[nod].size(); i++) ^ user.cpp: In function ‘void TDfs(int)’: user.cpp:46:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<transp[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:81:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<sol[cont[i].ord].size(); j++) ^ user.cpp: In function ‘void citire()’: user.cpp:22:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.in","r",stdin); ^ user.cpp:23:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.out","w",stdout); ^ user.cpp:24:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&M); ^ user.cpp:27:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^