Compilare: user.cpp: In function ‘int main()’: user.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=le;i++) ^ user.cpp:14:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsecv.in","r",stdin); ^ user.cpp:15:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsecv.out","w",stdout); ^