Compilare: user.cpp: In function ‘int main()’: user.cpp:63:22: warning: iteration 100003 invokes undefined behavior [-Waggressive-loop-optimizations] factorial[i] = (factorial[i-1]*i)%M; ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ user.cpp:62:22: note: within this loop for (ll i = 2; i <= 100005; ++i) ~~^~~~~~~~~