Compilare: main.cpp: In function 'std::pair<long long unsigned int, long long unsigned int> verf(long long unsigned int)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++){ ~^~~ main.cpp:49:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++){ ~^~~ main.cpp: In function 'int main()': main.cpp:71:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++){ ~^~~