Compilare: main.cpp: In function 'int main()': main.cpp:24:22: warning: iteration 999998 invokes undefined behavior [-Waggressive-loop-optimizations] if(v[0][i]==1){ ~~~~~~^ main.cpp:23:18: note: within this loop for(int i=2;i<=1000000;i++){ ~^~~~~~~~~ main.cpp:21:16: warning: iteration 1000000 invokes undefined behavior [-Waggressive-loop-optimizations] v[0][i]=1; ~~~~~~~^~ main.cpp:20:18: note: within this loop for(int i=0;i<=1000000;i++){ ~^~~~~~~~~