Compilare: main.cpp: In function 'int main()': main.cpp:8:23: warning: unused variable 'k' [-Wunused-variable] long long int n,m,k=0,x,y; ^ main.cpp:10:16: warning: iteration 1024 invokes undefined behavior [-Waggressive-loop-optimizations] d[0][i]=0; ~~~~~~~^~ main.cpp:9:28: note: within this loop for(long long int i=1;i<=1025;i++){ ~^~~~~~