Compilare: main.cpp: In function 'int main()': main.cpp:48:21: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] out << start << ' ' << finish << ' ' << minimax << '\n'; ^~~ main.cpp:48:56: warning: 'minimax' may be used uninitialized in this function [-Wmaybe-uninitialized] out << start << ' ' << finish << ' ' << minimax << '\n'; ^~~~ main.cpp:33:19: warning: 'prev' may be used uninitialized in this function [-Wmaybe-uninitialized] start = prev + 1; ~~~~~~^~~~~~~~~~