Compilare: main.cpp: In function 'void precalc()': main.cpp:21:15: warning: iteration 1000004 invokes undefined behavior [-Waggressive-loop-optimizations] 21 | fr[i] = i - 1; | ~~~~~~^~~~~~~ main.cpp:19:18: note: within this loop 19 | for(int i=1;i<=vmax+5;i++) | ~^~~~~~~~ main.cpp:33:15: warning: iteration 1000003 invokes undefined behavior [-Waggressive-loop-optimizations] 33 | fr[i] += fr[i-1]; | ~~~~~~^~~~~~~~~~ main.cpp:24:18: note: within this loop 24 | for(int i=2;i<=vmax+5;i++) | ~^~~~~~~~