Compilare: user.cpp: In function ‘int main()’: user.cpp:26:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<V.size();++i) ^ user.cpp:35:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<D.size();++i) maxim=max(maxim,D[i]); ^ user.cpp: In function ‘void openIOFiles()’: user.cpp:11:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plicuri.in","r",stdin); ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plicuri.out","w",stdout); ^ user.cpp: In function ‘int main()’: user.cpp:18:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:20:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^