Compilare: main.cpp: In function 'void precalc()': main.cpp:20:15: warning: iteration 1000004 invokes undefined behavior [-Waggressive-loop-optimizations] 20 | fr[i] = i - 1; | ~~~~~~^~~~~~~ main.cpp:18:18: note: within this loop 18 | for(int i=1;i<=vmax+5;i++) | ~^~~~~~~~ main.cpp:32:15: warning: iteration 1000003 invokes undefined behavior [-Waggressive-loop-optimizations] 32 | fr[i] += fr[i-1]; | ~~~~~~^~~~~~~~~~ main.cpp:23:18: note: within this loop 23 | for(int i=2;i<=vmax+5;i++) | ~^~~~~~~~