Compilare: main.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] # pragma GCC optimization ("unroll-loops") main.cpp: In function 'int32_t main()': main.cpp:38:33: warning: 'endd' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<bsum<<' '<<beg<<' '<<endd; ^ main.cpp:38:24: warning: 'beg' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<bsum<<' '<<beg<<' '<<endd; ^~~