Compilare: main.cpp: In function 'int main()': main.cpp:20:15: warning: iteration 1999998 invokes undefined behavior [-Waggressive-loop-optimizations] 20 | fib[i]=fib[i-1]+fib[i-2]; | ~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:18:18: note: within this loop 18 | for(int i=2;i<=2000000;i++) | ~^~~~~~~~~