Compilare: user.cpp: In function ‘void insert(int)’: user.cpp:13:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[p].size(); ++i) ^ user.cpp: In function ‘void remove(int)’: user.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[p].size(); ++i) { ^ user.cpp: In function ‘void query(int)’: user.cpp:32:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[p].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:44:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&q); ^ user.cpp:46:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d",&tsk,&arg); ^