Compilare: user.cpp: In function ‘int main()’: user.cpp:32:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr>D.size()/2) ^ user.cpp:61:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rnr>D.size()/2) ^ user.cpp:13:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&N); ^ user.cpp:16:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&val); ^ user.cpp:95:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tdeque.out","w",stdout); ^