Compilare: main.cpp: In function 'long long int cb(long long int, long long int)': main.cpp:36:9: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] return sol; ^~~ main.cpp: In function 'int main()': main.cpp:36:9: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] return sol; ^~~ main.cpp:27:6: note: 'sol' was declared here int sol; ^~~