Compilare: user.cpp: In function ‘int main()’: user.cpp:73:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q=0;q<hash[i].size();q++) ^ user.cpp:41:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d",&n); ^ user.cpp:45:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d ",&m); ^ user.cpp:49:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file,"%d %d ",&x,&y); ^