Compilare: main.cpp: In function 'long long int invers_modular(long long int)': main.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:41:21: warning: iteration 100009 invokes undefined behavior [-Waggressive-loop-optimizations] fact_mod[i] = fact_mod[i-1] * i % mod; ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:40:18: note: within this loop for(i = 1; i <= 100010; ++i) ~~^~~~~~~~~