Compilare: main.cpp: In function 'int main()': main.cpp:48:15: warning: unused variable 'i' [-Wunused-variable] 48 | int t,x,y,i,d=1; | ^ main.cpp:48:17: warning: unused variable 'd' [-Wunused-variable] 48 | int t,x,y,i,d=1; | ^ main.cpp: In function 'void precalc()': main.cpp:33:18: warning: iteration 2000004 invokes undefined behavior [-Waggressive-loop-optimizations] 33 | if(!viz[i]) | ~~~~~^ main.cpp:32:14: note: within this loop 32 | for(i=1;i<=NMAX;i++) | ~^~~~~~