Compilare: main.cpp:93:43: warning: integer constant is so large that it is unsigned while (nr2 <= (unsigned long long)18446744073709551615 / nr1){ ^~~~~~~~~~~~~~~~~~~~ main.cpp:104:53: warning: integer constant is so large that it is unsigned if (per[i].first <= (unsigned long long)18446744073709551615 - per[j].first){ ^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:42:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%llu",&v[i]); ^