Compilare: user.cpp: In function ‘int main()’: user.cpp:66:84: warning: format ‘%lf’ expects argument of type ‘double’, but argument 3 has type ‘clock_t {aka long int}’ [-Wformat=] fprintf(stderr, "time: %lf\n", (clock() - something_something) / CLOCKS_PER_SEC); ^ user.cpp:36:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%lf", &n, &r); ^ user.cpp:38:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%lf", &v[i].first, &v[i].second); ^