Compilare: In file included from /usr/include/c++/4.8/cassert:43:0, from user.cpp:5: user.cpp: In function ‘int main()’: user.cpp:154:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] assert(s.size()==lunff); ^ user.cpp:76:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lost.in","r",stdin); ^ user.cpp:77:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lost.out","w",stdout); ^