Compilare: main.cpp: In function 'void precalc()': main.cpp:19:15: warning: iteration 1000004 invokes undefined behavior [-Waggressive-loop-optimizations] 19 | fr[i] = i - 1; | ~~~~~~^~~~~~~ main.cpp:17:18: note: within this loop 17 | for(int i=1;i<=vmax+5;i++) | ~^~~~~~~~ main.cpp:31:15: warning: iteration 1000003 invokes undefined behavior [-Waggressive-loop-optimizations] 31 | fr[i] += fr[i-1]; | ~~~~~~^~~~~~~~~~ main.cpp:22:18: note: within this loop 22 | for(int i=2;i<=vmax+5;i++) | ~^~~~~~~~