Compilare: main.cpp: In function 'long long unsigned int f(long long unsigned int)': main.cpp:50:12: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare] 50 | if(val != -1){ | ~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:65:13: warning: unused variable 'mxexp' [-Wunused-variable] 65 | int mxexp = log(VMAX)/log(i); | ^~~~~