Compilare: user.cpp: In function ‘int main()’: user.cpp:28:23: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘i64* {aka long long int*}’ [-Wformat=] fscanf(fin, "%d", &n); ^ user.cpp:28:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^