Compilare: main.cpp: In function 'int main()': main.cpp:29:20: warning: iteration 250005 invokes undefined behavior [-Waggressive-loop-optimizations] if(fr[i]) nrd++; ~~~~^ main.cpp:28:23: note: within this loop for(int i=0; i<=NM; i++) ^ main.cpp:34:20: warning: iteration 250005 invokes undefined behavior [-Waggressive-loop-optimizations] if(fr[i]) ~~~~^ main.cpp:33:23: note: within this loop { for(int i=0; i<=NM; i++) ^