Compilare: main.cpp: In function 'int EulerInd(int)': main.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < primes.size() && primes[i] * primes[i] <= n; ++i ) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void GeneratePrimes()': main.cpp:37:14: warning: iteration 25001 invokes undefined behavior [-Waggressive-loop-optimizations] p[i] = true; ~~~~~^~~~~~ main.cpp:36:23: note: within this loop for( int i = 3; i <= VMAX; i += 2 ) ~~^~~~~~~