Compilare: main.cpp: In function 'int main()': main.cpp:19:14: warning: unused variable 'end' [-Wunused-variable] int beg, end, BEG, END; ^~~ main.cpp:41:38: warning: 'END' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << BEG + 1 << " " << END << " " << best_sum; ^~~ main.cpp:41:24: warning: 'BEG' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << BEG + 1 << " " << END << " " << best_sum; ^~~