Compilare: user.cpp: In function ‘void write()’: user.cpp:37:58: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 4 has type ‘int’ [-Wformat=] fprintf(out, "%d %lld ", HASH[i].first, HASH[i].second); ^ user.cpp: In function ‘void read()’: user.cpp:15:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &N); ^ user.cpp:18:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &M); ^ user.cpp:22:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &time, &money); ^