Compilare: user.cpp: In function ‘int main()’: user.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<e[i].size();j++){ ^ user.cpp:60:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<et.size();j++){ ^ user.cpp:64:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+1<et.size()) ^ user.cpp:67:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+1==et.size()) break; ^ user.cpp:21:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kino.out","w",stdout); ^