Compilare: main.cpp: In function 'long long unsigned int f(long long unsigned int)': main.cpp:72:12: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare] 72 | if(val != -1){ | ~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:88:13: warning: unused variable 'mxexp' [-Wunused-variable] 88 | int mxexp = log(VMAX)/log(i); | ^~~~~