Compilare: user.cpp: In function ‘void calcD(int, int*, int)’: user.cpp:16:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘int dfs2(int, int, int, int, int, int)’: user.cpp:36:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘int dfs(int, int, int, int)’: user.cpp:53:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("statiuni.in","r",stdin); ^ user.cpp:71:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:76:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^