Compilare: user.cpp: In function ‘int main()’: user.cpp:8:25: warning: unused variable ‘k’ [-Wunused-variable] int n,t,i,j,x,p,k; ^ user.cpp:26:49: warning: iteration 1000001 invokes undefined behavior [-Waggressive-loop-optimizations] for(int k=0;k<=1000001;k++)ap[k]=0; ~~~~~^~ user.cpp:26:30: note: within this loop for(int k=0;k<=1000001;k++)ap[k]=0; ~^~~~~~~~~ user.cpp:18:32: warning: iteration 1000001 invokes undefined behavior [-Waggressive-loop-optimizations] if(ap[k]>maxi){ ~~~~^ user.cpp:17:30: note: within this loop for(int k=0;k<=1000001;k++){ ~^~~~~~~~~ user.cpp:24:33: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(maxi>n)g<<p<<'\n'; ^~~~