Compilare: main.cpp: In function 'int main()': main.cpp:26:13: warning: iteration 2000004 invokes undefined behavior [-Waggressive-loop-optimizations] 26 | a[i]=a[i-1]*127%MOD; | ~~~~^~~~~~~~~~~~~~~ main.cpp:25:18: note: within this loop 25 | for(int i=1;i<=2000005;i++) | ~^~~~~~~~~